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Next: Location of VSS 96 Sentra ???
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External
Since: Aug 12, 2007
Posts: 62
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(Msg. 1) Posted: Sun Dec 30, 2007 5:35 pm
Post subject: Cold Start Problem-'92 Sentra 1.6L
Archived from groups: alt>autos>nissan (more info?)
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My Nissan has been having problems starting. The lower the
ambient temp, the harder the start. Once it runs, it's OK until
the engine is cold again. It takes me about 2-3 minutes to start
it when it is 30F out. Crank for 10 seconds. Wait 15 seconds. Repeat.
I noticed during the summer that it had a minor problem starting
when *hot*. It would start fine, then, when restarted, it would:
Start right up, RPMs would jump, drop, engine would stall. Turn
the key again, and maybe the same, or maybe it would be OK.
Usually a judicious amount of gas at startup would keep it
running. I don't know if this is related.
For the cold start problem, it cranks over fine. first there is
no combustion, then it "coughs" then it coughs more, then it
starts. It then runs normally. It seems as if all the cylinders
are not firing at first. Pumping the gas/holding at full throttle
do not seem to affect the time it takes to start the engine.
I did not have this car last winter, and the person I bought it
from cannot remember whether it showed this problem.
It has: fresh gas, drygas, fuel filter, air filter, oil and
filter, plugs and wires, cap and rotor, and PCV valve. The only
thing I know may be off is the timing; however the car runs the
same as before I changed the distributor and the problem started
showing up before this.
The gauges work normally, and the MIL is not on.
My thought is it is a bad coolant or air temp sensor. I'd rather
narrow it down or use a scan tool than start yanking things
randomly-it's *cold* here.
PB |
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External
Since: Jan 30, 2004
Posts: 149
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(Msg. 2) Posted: Mon Dec 31, 2007 10:07 am
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Plague Boy wrote:
> My Nissan has been having problems starting. The lower the
> ambient temp, the harder the start. Once it runs, it's OK until
> the engine is cold again. It takes me about 2-3 minutes to start it when
> it is 30F out. Crank for 10 seconds. Wait 15 seconds. Repeat.
>
> I noticed during the summer that it had a minor problem starting
> when *hot*. It would start fine, then, when restarted, it would:
> Start right up, RPMs would jump, drop, engine would stall. Turn
> the key again, and maybe the same, or maybe it would be OK.
> Usually a judicious amount of gas at startup would keep it
> running. I don't know if this is related.
>
> For the cold start problem, it cranks over fine. first there is no
> combustion, then it "coughs" then it coughs more, then it
> starts. It then runs normally. It seems as if all the cylinders
> are not firing at first. Pumping the gas/holding at full throttle
> do not seem to affect the time it takes to start the engine.
>
> I did not have this car last winter, and the person I bought it from
> cannot remember whether it showed this problem.
>
> It has: fresh gas, drygas, fuel filter, air filter, oil and filter,
> plugs and wires, cap and rotor, and PCV valve. The only thing I know may
> be off is the timing; however the car runs the same as before I changed
> the distributor and the problem started showing up before this.
>
> The gauges work normally, and the MIL is not on.
>
> My thought is it is a bad coolant or air temp sensor. I'd rather
> narrow it down or use a scan tool than start yanking things
> randomly-it's *cold* here.
>
> PB
>
If your coolant sensor is bad you should notice it as your gas mileage
will be bad because of it.
I seriously doubt its your air intake sensor, do you mean the MAF?
I would suggest cleaning your throttle body. Lots of carbon deposits
around the throttle body tend to affect low rpm drivability the most.
CD |
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External
Since: Aug 12, 2007
Posts: 62
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(Msg. 3) Posted: Tue Jan 01, 2008 11:56 am
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Codifus wrote:
> Plague Boy wrote:
>> My Nissan has been having problems starting. The lower the
>> ambient temp, the harder the start. Once it runs, it's OK until
>> the engine is cold again. It takes me about 2-3 minutes to start it
>> when it is 30F out. Crank for 10 seconds. Wait 15 seconds. Repeat.
>>
>> I noticed during the summer that it had a minor problem starting
>> when *hot*. It would start fine, then, when restarted, it would:
>> Start right up, RPMs would jump, drop, engine would stall. Turn
>> the key again, and maybe the same, or maybe it would be OK.
>> Usually a judicious amount of gas at startup would keep it
>> running. I don't know if this is related.
>>
>> For the cold start problem, it cranks over fine. first there is no
>> combustion, then it "coughs" then it coughs more, then it
>> starts. It then runs normally. It seems as if all the cylinders
>> are not firing at first. Pumping the gas/holding at full throttle
>> do not seem to affect the time it takes to start the engine.
>>
>> I did not have this car last winter, and the person I bought it
>> from cannot remember whether it showed this problem.
>>
>> It has: fresh gas, drygas, fuel filter, air filter, oil and
>> filter, plugs and wires, cap and rotor, and PCV valve. The only thing
>> I know may be off is the timing; however the car runs the same as
>> before I changed the distributor and the problem started showing up
>> before this.
>>
>> The gauges work normally, and the MIL is not on.
>>
>> My thought is it is a bad coolant or air temp sensor. I'd rather
>> narrow it down or use a scan tool than start yanking things
>> randomly-it's *cold* here.
>>
>> PB
<I am leaving this whole in case people have lost last year's posts>
> If your coolant sensor is bad you should notice it as your gas mileage
will be bad because of it.
Gas Mileage is 22-30 MPG, which seems OK.
>
> I seriously doubt its your air intake sensor, do you mean the MAF?
No, I presume there is a sensor for the air temp. I will check
the manuals and confirm this.
>
> I would suggest cleaning your throttle body. Lots of carbon deposits
> around the throttle body tend to affect low rpm drivability the most.
Well, the car drives fine, once it *starts*. If it's not the
coolant sensor, could it be an injector is letting the fuel leak
into the cylinder?
Thank you for taking the time to reply, and Happy New Year to
everybody here!
--
PB
"I suspect you're an arrogant little pissant who grew up in the
Red Bull generation." - CJW >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Sep 02, 2003
Posts: 740
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(Msg. 4) Posted: Tue Jan 01, 2008 9:12 pm
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Plague Boy <plague_boy.DeleteThis@earthlink.net> wrote in
news:13nks5mqmari113@corp.supernews.com:
> Codifus wrote:
>> Plague Boy wrote:
>>> My Nissan has been having problems starting. The lower the
>>> ambient temp, the harder the start. Once it runs, it's OK until
>>> the engine is cold again. It takes me about 2-3 minutes to start it
>>> when it is 30F out. Crank for 10 seconds. Wait 15 seconds. Repeat.
>>>
>>> I noticed during the summer that it had a minor problem starting
>>> when *hot*. It would start fine, then, when restarted, it would:
>>> Start right up, RPMs would jump, drop, engine would stall. Turn
>>> the key again, and maybe the same, or maybe it would be OK.
>>> Usually a judicious amount of gas at startup would keep it
>>> running. I don't know if this is related.
>>>
>>> For the cold start problem, it cranks over fine. first there is no
>>> combustion, then it "coughs" then it coughs more, then it
>>> starts. It then runs normally. It seems as if all the cylinders
>>> are not firing at first. Pumping the gas/holding at full throttle
>>> do not seem to affect the time it takes to start the engine.
>>>
>>> I did not have this car last winter, and the person I bought it
>>> from cannot remember whether it showed this problem.
>>>
>>> It has: fresh gas, drygas, fuel filter, air filter, oil and
>>> filter, plugs and wires, cap and rotor, and PCV valve. The only thing
>>> I know may be off is the timing; however the car runs the same as
>>> before I changed the distributor and the problem started showing up
>>> before this.
>>>
>>> The gauges work normally, and the MIL is not on.
>>>
>>> My thought is it is a bad coolant or air temp sensor. I'd rather
>>> narrow it down or use a scan tool than start yanking things
>>> randomly-it's *cold* here.
>>>
>>> PB
><I am leaving this whole in case people have lost last year's posts>
>
>> If your coolant sensor is bad you should notice it as your gas mileage
> will be bad because of it.
> Gas Mileage is 22-30 MPG, which seems OK.
>>
>> I seriously doubt its your air intake sensor, do you mean the MAF?
> No, I presume there is a sensor for the air temp. I will check
> the manuals and confirm this.
>>
>> I would suggest cleaning your throttle body. Lots of carbon deposits
>> around the throttle body tend to affect low rpm drivability the most.
> Well, the car drives fine, once it *starts*. If it's not the
> coolant sensor, could it be an injector is letting the fuel leak
> into the cylinder?
>
> Thank you for taking the time to reply, and Happy New Year to
> everybody here!
>
I wonder if you have a bad idle air control valve(IACV)?
maybe it's sticking.
have you cleaned/replaced the PCV valve?
--
Jim Yanik
jyanik
at
kua.net >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Apr 17, 2007
Posts: 54
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(Msg. 5) Posted: Wed Jan 02, 2008 7:18 am
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Jan 1, 11:56 am, Plague Boy <plague_....TakeThisOut@earthlink.net> wrote:
> Codifus wrote:
> > Plague Boy wrote:
> >> My Nissan has been having problems starting. The lower the
> >> ambient temp, the harder the start. Once it runs, it's OK until
> >> the engine is cold again. It takes me about 2-3 minutes to start it
> >> when it is 30F out. Crank for 10 seconds. Wait 15 seconds. Repeat.
>
> >> I noticed during the summer that it had a minor problem starting
> >> when *hot*. It would start fine, then, when restarted, it would:
> >> Start right up, RPMs would jump, drop, engine would stall. Turn
> >> the key again, and maybe the same, or maybe it would be OK.
> >> Usually a judicious amount of gas at startup would keep it
> >> running. I don't know if this is related.
>
> >> For the cold start problem, it cranks over fine. first there is no
> >> combustion, then it "coughs" then it coughs more, then it
> >> starts. It then runs normally. It seems as if all the cylinders
> >> are not firing at first. Pumping the gas/holding at full throttle
> >> do not seem to affect the time it takes to start the engine.
>
> >> I did not have this car last winter, and the person I bought it
> >> from cannot remember whether it showed this problem.
>
> >> It has: fresh gas, drygas, fuel filter, air filter, oil and
> >> filter, plugs and wires, cap and rotor, and PCV valve. The only thing
> >> I know may be off is the timing; however the car runs the same as
> >> before I changed the distributor and the problem started showing up
> >> before this.
>
> >> The gauges work normally, and the MIL is not on.
>
> >> My thought is it is a bad coolant or air temp sensor. I'd rather
> >> narrow it down or use a scan tool than start yanking things
> >> randomly-it's *cold* here.
>
> >> PB
>
> <I am leaving this whole in case people have lost last year's posts>
>
> > If your coolant sensor is bad you should notice it as your gas mileage
>
> will be bad because of it.
> Gas Mileage is 22-30 MPG, which seems OK.
>
> > I seriously doubt its your air intake sensor, do you mean the MAF?
>
> No, I presume there is a sensor for the air temp. I will check
> the manuals and confirm this.
>
> > I would suggest cleaning your throttle body. Lots of carbon deposits
> > around the throttle body tend to affect low rpm drivability the most.
>
> Well, the car drives fine, once it *starts*. If it's not the
> coolant sensor, could it be an injector is letting the fuel leak
> into the cylinder?
>
> Thank you for taking the time to reply, and Happy New Year to
> everybody here!
>
> --
> PB
> "I suspect you're an arrogant little pissant who grew up in the
> Red Bull generation." - CJW
22 MPG from a 1.6 liter engine?? I have a 98 Sentra 1.6 with a 5 speed
manual. For the whole tank I get no less than 28 mpg. I tend to have a
lead foot and have never gotten less than 27. If my tankful is mostly
a highway jaunt I get 31 or more.
I think it's your sensor.
CD >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Aug 12, 2007
Posts: 62
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(Msg. 6) Posted: Wed Jan 02, 2008 9:19 pm
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Jim Yanik wrote:
<snip>
> I wonder if you have a bad idle air control valve(IACV)?
> maybe it's sticking.
I'm taking this under consideration. It's 10F here now, and the
IACV looks to be about $100, so the cooland temp sensor looks
more attractive as a possibility. <g>
> have you cleaned/replaced the PCV valve?
Replaced in Sept. Old one seemed OK, but for $4.00....
Thank you for your input.
--
PB
"I suspect you're an arrogant little pissant who grew up in the
Red Bull generation." - CJW >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Aug 12, 2007
Posts: 62
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(Msg. 7) Posted: Wed Jan 02, 2008 9:50 pm
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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codifus wrote:
> 22 MPG from a 1.6 liter engine?? I have a 98 Sentra 1.6 with a 5 speed
> manual. For the whole tank I get no less than 28 mpg. I tend to have a
> lead foot and have never gotten less than 27. If my tankful is mostly
> a highway jaunt I get 31 or more.
Well... all my cars seem to get about 20MPG city.  I haven't
really kept track of the MPG since I got the car other than the
first tank. I mainly drive it 1 mile to work and back, a little
around the city, and once a month or so a little road trip out of
the city. I would like to describe my driving style as "spirited".
>
> I think it's your sensor.
I googled for a while last night, but I did not find anything
definitive. Since it looks like a good probability, I'm going to
see if I can get a friend to pick up a new sensor and bring it to
me. We're going into an Arctic Freeze here, and the car is
covered in 1' of fresh snow AND my street is not plowed yet, it
may be a few days until I can get it installed. *sigh*
Thanks for the info on the gas milage. I guess I've been
conditioned not to expect too much from older, high-mileage cars
that haven't been maintained. Maybe I'm in for a surprise!
--
PB
"I suspect you're an arrogant little pissant who grew up in the
Red Bull generation." - CJW >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Apr 12, 2006
Posts: 151
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(Msg. 8) Posted: Thu Jan 03, 2008 12:19 pm
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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on 1/2/2008 10:18 AM codifus said the following:
> On Jan 1, 11:56 am, Plague Boy <plague_....TakeThisOut@earthlink.net> wrote:
>
>> Codifus wrote:
>>
>>> Plague Boy wrote:
>>>
>>>> My Nissan has been having problems starting. The lower the
>>>> ambient temp, the harder the start. Once it runs, it's OK until
>>>> the engine is cold again. It takes me about 2-3 minutes to start it
>>>> when it is 30F out. Crank for 10 seconds. Wait 15 seconds. Repeat.
>>>>
>>>> I noticed during the summer that it had a minor problem starting
>>>> when *hot*. It would start fine, then, when restarted, it would:
>>>> Start right up, RPMs would jump, drop, engine would stall. Turn
>>>> the key again, and maybe the same, or maybe it would be OK.
>>>> Usually a judicious amount of gas at startup would keep it
>>>> running. I don't know if this is related.
>>>>
>>>> For the cold start problem, it cranks over fine. first there is no
>>>> combustion, then it "coughs" then it coughs more, then it
>>>> starts. It then runs normally. It seems as if all the cylinders
>>>> are not firing at first. Pumping the gas/holding at full throttle
>>>> do not seem to affect the time it takes to start the engine.
>>>>
>>>> I did not have this car last winter, and the person I bought it
>>>> from cannot remember whether it showed this problem.
>>>>
>>>> It has: fresh gas, drygas, fuel filter, air filter, oil and
>>>> filter, plugs and wires, cap and rotor, and PCV valve. The only thing
>>>> I know may be off is the timing; however the car runs the same as
>>>> before I changed the distributor and the problem started showing up
>>>> before this.
>>>>
>>>> The gauges work normally, and the MIL is not on.
>>>>
>>>> My thought is it is a bad coolant or air temp sensor. I'd rather
>>>> narrow it down or use a scan tool than start yanking things
>>>> randomly-it's *cold* here.
>>>>
>>>> PB
>>>>
>> <I am leaving this whole in case people have lost last year's posts>
>>
>>
>>> If your coolant sensor is bad you should notice it as your gas mileage
>>>
>> will be bad because of it.
>> Gas Mileage is 22-30 MPG, which seems OK.
>>
>>
>>> I seriously doubt its your air intake sensor, do you mean the MAF?
>>>
>> No, I presume there is a sensor for the air temp. I will check
>> the manuals and confirm this.
>>
>>
>>> I would suggest cleaning your throttle body. Lots of carbon deposits
>>> around the throttle body tend to affect low rpm drivability the most.
>>>
>> Well, the car drives fine, once it *starts*. If it's not the
>> coolant sensor, could it be an injector is letting the fuel leak
>> into the cylinder?
>>
>> Thank you for taking the time to reply, and Happy New Year to
>> everybody here!
>>
>> --
>> PB
>> "I suspect you're an arrogant little pissant who grew up in the
>> Red Bull generation." - CJW
>>
>
> 22 MPG from a 1.6 liter engine?? I have a 98 Sentra 1.6 with a 5 speed
> manual. For the whole tank I get no less than 28 mpg. I tend to have a
> lead foot and have never gotten less than 27. If my tankful is mostly
> a highway jaunt I get 31 or more.
>
> I think it's your sensor.
>
> CD
>
I had an 86 Nissan Pulsar (carburetored) and a 93 Sentra 2 door (FI).
Both were 1.6 L and stick shifts, and both got mileage in the mid 30s. I
commuted 90 miles a day in those two cars for 14 years. Now they espouse
gas mileage in the mid 30s for new cars like it's a breakthrough. What
happened between 1986 and now?
--
Bill
In Hamptonburgh, NY
To email, remove the double zeroes after @ >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Jan 30, 2004
Posts: 149
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(Msg. 9) Posted: Thu Jan 03, 2008 11:01 pm
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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Plague Boy wrote:
> codifus wrote:
>
>> 22 MPG from a 1.6 liter engine?? I have a 98 Sentra 1.6 with a 5 speed
>> manual. For the whole tank I get no less than 28 mpg. I tend to have a
>> lead foot and have never gotten less than 27. If my tankful is mostly
>> a highway jaunt I get 31 or more.
>
>
> Well... all my cars seem to get about 20MPG city. I haven't really
> kept track of the MPG since I got the car other than the first tank. I
> mainly drive it 1 mile to work and back, a little around the city, and
> once a month or so a little road trip out of the city. I would like to
> describe my driving style as "spirited".
>
>>
>> I think it's your sensor.
>
>
> I googled for a while last night, but I did not find anything
> definitive. Since it looks like a good probability, I'm going to see if
> I can get a friend to pick up a new sensor and bring it to me. We're
> going into an Arctic Freeze here, and the car is covered in 1' of fresh
> snow AND my street is not plowed yet, it may be a few days until I can
> get it installed. *sigh*
>
> Thanks for the info on the gas milage. I guess I've been conditioned
> not to expect too much from older, high-mileage cars that haven't been
> maintained. Maybe I'm in for a surprise!
>
Things getting a bit clearer now. If you only drive one mile to work
then that means your car probably never reaches operating tempurature
before you've even finished your commute to work. During the warmup
cycle the car runs rich and hence has terrible gas mileage. Given this
situation, perhaps 20 mpg is "normal" for your driving situation.
The temp sensor doesn't even come into play with this scenario. It may
be bad, but if you replace it you won't notice a difference/improvement.
I wouldn't bother replacing it for the moment. Maybe wait till its warmer.
CD >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Apr 17, 2007
Posts: 54
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(Msg. 10) Posted: Fri Jan 04, 2008 6:37 am
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Jan 3, 12:19 pm, willshak <wills... RemoveThis @00hvc.rr.com> wrote:
> on 1/2/2008 10:18 AM codifus said the following:
>
>
>
> > On Jan 1, 11:56 am, Plague Boy <plague_... RemoveThis @earthlink.net> wrote:
>
> >> Codifus wrote:
>
> >>> Plague Boy wrote:
>
> >>>> My Nissan has been having problems starting. The lower the
> >>>> ambient temp, the harder the start. Once it runs, it's OK until
> >>>> the engine is cold again. It takes me about 2-3 minutes to start it
> >>>> when it is 30F out. Crank for 10 seconds. Wait 15 seconds. Repeat.
>
> >>>> I noticed during the summer that it had a minor problem starting
> >>>> when *hot*. It would start fine, then, when restarted, it would:
> >>>> Start right up, RPMs would jump, drop, engine would stall. Turn
> >>>> the key again, and maybe the same, or maybe it would be OK.
> >>>> Usually a judicious amount of gas at startup would keep it
> >>>> running. I don't know if this is related.
>
> >>>> For the cold start problem, it cranks over fine. first there is no
> >>>> combustion, then it "coughs" then it coughs more, then it
> >>>> starts. It then runs normally. It seems as if all the cylinders
> >>>> are not firing at first. Pumping the gas/holding at full throttle
> >>>> do not seem to affect the time it takes to start the engine.
>
> >>>> I did not have this car last winter, and the person I bought it
> >>>> from cannot remember whether it showed this problem.
>
> >>>> It has: fresh gas, drygas, fuel filter, air filter, oil and
> >>>> filter, plugs and wires, cap and rotor, and PCV valve. The only thing
> >>>> I know may be off is the timing; however the car runs the same as
> >>>> before I changed the distributor and the problem started showing up
> >>>> before this.
>
> >>>> The gauges work normally, and the MIL is not on.
>
> >>>> My thought is it is a bad coolant or air temp sensor. I'd rather
> >>>> narrow it down or use a scan tool than start yanking things
> >>>> randomly-it's *cold* here.
>
> >>>> PB
>
> >> <I am leaving this whole in case people have lost last year's posts>
>
> >>> If your coolant sensor is bad you should notice it as your gas mileage
>
> >> will be bad because of it.
> >> Gas Mileage is 22-30 MPG, which seems OK.
>
> >>> I seriously doubt its your air intake sensor, do you mean the MAF?
>
> >> No, I presume there is a sensor for the air temp. I will check
> >> the manuals and confirm this.
>
> >>> I would suggest cleaning your throttle body. Lots of carbon deposits
> >>> around the throttle body tend to affect low rpm drivability the most.
>
> >> Well, the car drives fine, once it *starts*. If it's not the
> >> coolant sensor, could it be an injector is letting the fuel leak
> >> into the cylinder?
>
> >> Thank you for taking the time to reply, and Happy New Year to
> >> everybody here!
>
> >> --
> >> PB
> >> "I suspect you're an arrogant little pissant who grew up in the
> >> Red Bull generation." - CJW
>
> > 22 MPG from a 1.6 liter engine?? I have a 98 Sentra 1.6 with a 5 speed
> > manual. For the whole tank I get no less than 28 mpg. I tend to have a
> > lead foot and have never gotten less than 27. If my tankful is mostly
> > a highway jaunt I get 31 or more.
>
> > I think it's your sensor.
>
> > CD
>
> I had an 86 Nissan Pulsar (carburetored) and a 93 Sentra 2 door (FI).
> Both were 1.6 L and stick shifts, and both got mileage in the mid 30s. I
> commuted 90 miles a day in those two cars for 14 years. Now they espouse
> gas mileage in the mid 30s for new cars like it's a breakthrough. What
> happened between 1986 and now?
>
> --
>
> Bill
> In Hamptonburgh, NY
> To email, remove the double zeroes after @
The cars got more powerful, cleaner,and more sophisticated. The 1.6
liter in my 98 sentra has DOHC, 16 valves, multi-port fuel injection
and OBDII for a very clean exhaust. It's rated at 115 HP.
CD >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Apr 17, 2007
Posts: 54
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(Msg. 11) Posted: Fri Jan 04, 2008 6:39 am
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Jan 4, 8:02 am, still just me <wheeledBobNOS... RemoveThis @yahoo.com> wrote:
> On Thu, 03 Jan 2008 23:01:51 -0500, Codifus <codi... RemoveThis @optonline.net>
> wrote:
>
> >Things getting a bit clearer now. If you only drive one mile to work
> >then that means your car probably never reaches operating tempurature
> >before you've even finished your commute to work. During the warmup
> >cycle the car runs rich and hence has terrible gas mileage. Given this
> >situation, perhaps 20 mpg is "normal" for your driving situation.
>
> Definitely! Mileage is _very_ low for the first couple miles of
> driving. If you add in temps below 20 degrees, it drops some more. A
> car that gets 28mpg in a reasonable highway/city mix probably gets
> 14-18mpg at 10 degrees F on a two mile drive.
In tempuratures as cold as those maybe you should do like the truckers
do and block the radiator. I did that for mine because my thermostat
seems to be stuck open . . .or is just old and tired.
CD >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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External
Since: Nov 14, 2007
Posts: 132
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(Msg. 12) Posted: Fri Jan 04, 2008 1:02 pm
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
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External
Since: Aug 12, 2007
Posts: 62
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(Msg. 13) Posted: Sat Jan 12, 2008 11:49 pm
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
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Codifus wrote:
<cold start problem>
> The temp sensor doesn't even come into play with this scenario. It may
> be bad, but if you replace it you won't notice a difference/improvement.
>
> I wouldn't bother replacing it for the moment. Maybe wait till its warmer.
OK. Since I've replaced the alternator, the car seems to be
working again. It's been unseasonably warm here, so the car has
been starting fine.
I was checking the fluids today when I noticed the vacuum hose
that goes to what I assume is the fuel pressure regulator is
looking....old and tired. I'd like to know what purpose this hose
serves. I'm wondering if the hose leaking requires me to crank
the engine endlessly to build up vacuum.
When I turn the key, if I leave it on "run" rather than "start"
I hear (I'm presuming) the fuel pump run for about three seconds,
then it stops. I have fresh fuel, drygas, and new fuel filter.
I presume that my compression is not the problem, nor the spark.
I'm also thinking that it's a fuel starvation problem, not a
flooding problem. It just seems as if whatever passes for a choke
in this car is not working. I do not find listings in the on-line
auto parts sites for any kind of "cold start" valve however.
--
PB
"I suspect you're an arrogant little pissant who grew up in the
Red Bull generation." - CJW >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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Since: Apr 17, 2007
Posts: 54
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(Msg. 14) Posted: Sun Jan 13, 2008 7:33 am
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
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On Jan 12, 11:49 pm, Plague Boy <plague_... RemoveThis @earthlink.net> wrote:
> Codifus wrote:
>
> <cold start problem>
>
> > The temp sensor doesn't even come into play with this scenario. It may
> > be bad, but if you replace it you won't notice a difference/improvement.
>
> > I wouldn't bother replacing it for the moment. Maybe wait till its warmer.
>
> OK. Since I've replaced the alternator, the car seems to be
> working again. It's been unseasonably warm here, so the car has
> been starting fine.
>
> I was checking the fluids today when I noticed the vacuum hose
> that goes to what I assume is the fuel pressure regulator is
> looking....old and tired. I'd like to know what purpose this hose
> serves. I'm wondering if the hose leaking requires me to crank
> the engine endlessly to build up vacuum.
>
> When I turn the key, if I leave it on "run" rather than "start"
> I hear (I'm presuming) the fuel pump run for about three seconds,
> then it stops. I have fresh fuel, drygas, and new fuel filter.
>
> I presume that my compression is not the problem, nor the spark.
> I'm also thinking that it's a fuel starvation problem, not a
> flooding problem. It just seems as if whatever passes for a choke
> in this car is not working. I do not find listings in the on-line
> auto parts sites for any kind of "cold start" valve however.
>
> --
> PB
> "I suspect you're an arrogant little pissant who grew up in the
> Red Bull generation." - CJW
I'm not sure what to suggest at this point. When you leave the car in
"run" mode and wait a few moments for the feul pump to pressurize the
system, does the car start better? Also, it could be a vacuum issue as
you've mentioned. If that hose is leaking, replace it.
CD >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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Since: Aug 12, 2007
Posts: 62
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(Msg. 15) Posted: Sun Jan 13, 2008 11:45 am
Post subject: Re: Cold Start Problem-'92 Sentra 1.6L [Login to view extended thread Info.]
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codifus wrote:
<snip>
> I'm not sure what to suggest at this point. When you leave the car in
> "run" mode and wait a few moments for the feul pump to pressurize the
> system, does the car start better?
No. Nothing I have done makes the car start better. The manual
does say that the fuel pump will shut off after three seconds
without a signal from the crank/distrib sensor. I thought it shut
off because the line pressure had built up.
Also, it could be a vacuum issue as
> you've mentioned. If that hose is leaking, replace it.
It definitely looks as if it could leak. I already found out the
cruise wasn't working because the hose was split. So close
examination or replacement of all the vacuum lines would seem to
be in order.
Unfortunately, my house is jealous of all the time I'm spending
with the car. I'm going to have to spend some "quality time"
replacing my HW heater, which stuck in the "on" position
yesterday. *sigh* Well, it didn't happen while I was away for a
week at Christmas- I could now be *living* in the Nissan.
>
> CD
--
PB
"I suspect you're an arrogant little pissant who grew up in the
Red Bull generation." - CJW >> Stay informed about: Cold Start Problem-'92 Sentra 1.6L |
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