Welcome to AutoBoardz.com!
FAQFAQ      ProfileProfile    Private MessagesPrivate Messages   Log inLog in

4.3 liter wont start on the first crank.

 
   AutoBoardz (Home) -> Chevrolet Forum RSS
Next:  88 G20 lack of power  
Author Message
jim

External


Since: Mar 07, 2006
Posts: 3



(Msg. 1) Posted: Fri Mar 17, 2006 5:31 pm
Post subject: 4.3 liter wont start on the first crank.
Archived from groups: alt>trucks>chevy (more info?)

I'm wearing out my starter. It takes 3 short cranking sessions to start
the 4.3 liter in my 2000 Astrovan, maybe 5 or 6 on cold mornings. For
most of its life it started on the first crank. Now it takes at least
two short cranks when hot and 3 or 4 when cold. I could crank until the
battery was dead and it wouldn't start on the first crank, most likely
the second too. Three short cranks of 3 or 4 seconds will have it
running every time. Until I figured out this secret I was cranking the
hell out of it on the first two and maybe flooding it to the point of
not starting at all for a couple of hours. Flooding is only a guess
althought it smelled of gas. Coming from the old school it's hard not
to pump it a time or two if it doesn't go right away. For a while I was
getting some missing from time to time. I changed the plugs, 125000
miles, and that cured the missing although not immediatly. Before the
plug change I got a trouble code from time to time. I forget the number
but the error was, "random misses" or something to that affect. The
code wasn't definative.

Now please don't respond with some bullshit about how I'm stupid and
4.3s never start on the first crank and I'm expecting too much. If
that's the best you've got to contribute I don't want to hear it.

Anybody experiencing a similar problem? Better yet, has anybody had
that problem and found a solution?

Thanks,

Jim

 >> Stay informed about: 4.3 liter wont start on the first crank. 
Back to top
Login to vote
Miller

External


Since: Mar 13, 2006
Posts: 14



(Msg. 2) Posted: Fri Mar 17, 2006 7:56 pm
Post subject: Re: 4.3 liter wont start on the first crank. [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Random Misfires means just that - the computer doesn't see a misfire
on the same plug all the time.

Some things it could be:
1. Clogged fuel filter - when did you last change this?
2. Fuel pump
3. Fuel pressure regulator
4. Rotor, Distributor cap
5. Plug wires (unless changed when you did the plugs)

Save 2 and 3 till later, do 1, 4, and 5. You might also get the
computer scanned with a higher-quality scanner - there are often codes
scored that won't turn on the check engine light, but which can
provide clues. The Autozone scanner they use for you, as I recall only
pulls "set" codes (ie, once the light is on). A dealer or independent
shop will have a much better scan tool that can provide more info.

A few other things, not likely.. exhaust leak; plugged cat converter.
Bad sensor. other emissions things.

"jim" <jpeter.DeleteThis@marlette.k12.mi.us> wrote:

>I'm wearing out my starter. It takes 3 short cranking sessions to start
>the 4.3 liter in my 2000 Astrovan, maybe 5 or 6 on cold mornings. For
>most of its life it started on the first crank. Now it takes at least
>two short cranks when hot and 3 or 4 when cold. I could crank until the
>battery was dead and it wouldn't start on the first crank, most likely
>the second too. Three short cranks of 3 or 4 seconds will have it
>running every time. Until I figured out this secret I was cranking the
>hell out of it on the first two and maybe flooding it to the point of
>not starting at all for a couple of hours. Flooding is only a guess
>althought it smelled of gas. Coming from the old school it's hard not
>to pump it a time or two if it doesn't go right away. For a while I was
>getting some missing from time to time. I changed the plugs, 125000
>miles, and that cured the missing although not immediatly. Before the
>plug change I got a trouble code from time to time. I forget the number
>but the error was, "random misses" or something to that affect. The
>code wasn't definative.
>
>Now please don't respond with some bullshit about how I'm stupid and
>4.3s never start on the first crank and I'm expecting too much. If
>that's the best you've got to contribute I don't want to hear it.
>
>Anybody experiencing a similar problem? Better yet, has anybody had
>that problem and found a solution?
>
>Thanks,
>
>Jim

 >> Stay informed about: 4.3 liter wont start on the first crank. 
Back to top
Login to vote
Whitelightning

External


Since: Aug 11, 2004
Posts: 659



(Msg. 3) Posted: Fri Mar 17, 2006 10:55 pm
Post subject: Re: 4.3 liter wont start on the first crank. [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"jim" <jpeter DeleteThis @marlette.k12.mi.us> wrote in message
news:1142645511.185183.12820@e56g2000cwe.googlegroups.com...
> I'm wearing out my starter. It takes 3 short cranking sessions to start
> the 4.3 liter in my 2000 Astrovan, maybe 5 or 6 on cold mornings. For
> most of its life it started on the first crank. Now it takes at least
> two short cranks when hot and 3 or 4 when cold. I could crank until the
> battery was dead and it wouldn't start on the first crank, most likely
> the second too. Three short cranks of 3 or 4 seconds will have it
> running every time. Until I figured out this secret I was cranking the
> hell out of it on the first two and maybe flooding it to the point of
> not starting at all for a couple of hours. Flooding is only a guess
> althought it smelled of gas. Coming from the old school it's hard not
> to pump it a time or two if it doesn't go right away.

If you pump the throttle while she is cranking and the computer sees the
reading of wide open throttle from the throttle position sensor it shuts the
fuel pump off assuming your telling it it is flooded.
Next time watch the oil pressure gauge when your cranking, if she starts
when then oil pressure gauge hits 10psi, check the fule pump relay. The
fail safe if the relay goes bad is the oil pressure switch.
Also when you say 3 or 4 short cranks, are you turning the key completly off
and then back on each time you do it? what fuel injection system?

I'll agree with Miller, change the cap and rotor and wires, and don't use a
cheap nor Bosch wires, GM's can burn a cheap cap and rotor in short order.
AC Delco wires or Packard's(who make AC Delco wires) work best. Use
dielectric grease in cap and plug terminals, and anti seize on the plug
threads, and don't over tighten the plugs.

Whitelightning
 >> Stay informed about: 4.3 liter wont start on the first crank. 
Back to top
Login to vote
Jim M2

External


Since: Jul 23, 2004
Posts: 18



(Msg. 4) Posted: Sat Mar 18, 2006 9:11 pm
Post subject: Re: 4.3 liter wont start on the first crank. [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

Had a similar problem on my 2000 Yukon XL, 5.3 liter. Actually, it still has
this problem, but in my case there was an easy way to live with it. I
discovered that the ignition switch is either out of adjustment or slightly
defective. If the switch is turned fully to the "stop" when cranking, one of
the contacts apparently opens and the fuel pump shuts down. If I only turn
the ignition switch just enough to engage the starter, it fires up first
time, every time. What was happening before was each time I cranked the
engine, it would receive a very short burst of fuel as the switch went past
the "good" portion of the contacts, and therefore repeated short crankings
would start it, where one long one wouldn't. Worth a try.

Jim M.
 >> Stay informed about: 4.3 liter wont start on the first crank. 
Back to top
Login to vote
digitalmaster

External


Since: Aug 14, 2004
Posts: 5



(Msg. 5) Posted: Sun Mar 19, 2006 6:29 pm
Post subject: Re: 4.3 liter wont start on the first crank. [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)

"Jim M" <jbmoore3nospam.RemoveThis@comcast.net> wrote in message
news:-PadnRIHjvJ3IIHZRVn-tg@comcast.com...
> Had a similar problem on my 2000 Yukon XL, 5.3 liter. Actually, it still
> has this problem, but in my case there was an easy way to live with it. I
> discovered that the ignition switch is either out of adjustment or
> slightly defective. If the switch is turned fully to the "stop" when
> cranking, one of the contacts apparently opens and the fuel pump shuts
> down. If I only turn the ignition switch just enough to engage the
> starter, it fires up first time, every time. What was happening before was
> each time I cranked the engine, it would receive a very short burst of
> fuel as the switch went past the "good" portion of the contacts, and
> therefore repeated short crankings would start it, where one long one
> wouldn't. Worth a try.
>
> Jim M.
>
>
I have a similar problem with my sonoma..sometimes it cranks right
away...sometimes it takes 3-4 cranks...i will try turning the key just
enough to engage starter.
 >> Stay informed about: 4.3 liter wont start on the first crank. 
Back to top
Login to vote
gearbox




Joined: Mar 18, 2006
Posts: 6



(Msg. 6) Posted: Thu Mar 23, 2006 4:29 am
Post subject: Re: 4.3 liter wont start on the first crank. [Login to view extended thread Info.]

Back to top
Login to vote
Display posts from previous:   
Related Topics:
1988 s10 wont start? - Just bought a 88 s10 with the 2.5 4cylinder. It was running a little rough so I decide to do a tuneup. I did the plugs and wires and drove it and it was better then I decided to do the cap and rotor. Now I cant get it to start. Anyone know the firing...

98 1500 4.3L wont start - I have a 98 chev 1500 w/t with the 4.3L vortec. I havent drive it it sometime about a year and half but start it every month or so to keep everything lubricated and charged up. The other day I went to go for a drive and got about a quarter mile down th...

1997 4x4 z 71 wont start unless its primed ?? - 97 350 chev truck , it wont start unless i prime it in the trodel body, then runs for 2-3 days then back to same thing again, prime it and it starts . its got a new fule pump, new fule filter , presure is at 50 lbs at idel and runs 60 lbs - 70 lbs when...

96 blazer wont start - ok the problem im having is i just replaced the fuel injectors because they went. i have checked and there is power going to them. the fuel pump is working and has the correct pressure. also the pcm in new i cant figure out what it can be. any help..

97 chevy Blazer wont start - it was idoling and stalled as if it run out of gas but there is plenty of gas I have changed the alt and battery and it stiil wont start any ideas?
   AutoBoardz (Home) -> Chevrolet Forum All times are: Pacific Time (US & Canada) (change)
Page 1 of 1

 
You can post new topics in this forum
You can reply to topics in this forum
You can edit your posts in this forum
You can delete your posts in this forum
You can vote in polls in this forum



[ Contact us | Terms of Service/Privacy Policy ]