 |
|
|
|
Next: Console 88 xj-s hess v12
|
| Author |
Message |
External
Since: Jan 09, 2007
Posts: 2
|
(Msg. 1) Posted: Tue Jan 09, 2007 12:16 am
Post subject: 93 chev k2500 suburb 7.4 tbi
Archived from groups: alt>autos>4x4>chevy-trucks (more info?)
|
|
|
new motor ,map,tps,o2,speed sensor,shift solinoids, new dist.cold start
engine, no cold loop,(idle only about 750)engine light on,(code 42)holds
on to shift points,no misses, go for a drive, stop, turn off, restart
engine, idles normal but begines to miss with tach spike not neccasarily
corrisponding to spike,(like voltage spike, from 750 to 2000 on tach)no
engine light,miss is severe enough to almost kill engine
(very sharp misses,like voltage from distributor dropping off),turn off,
restart after ten minutes engine light back on, spike gone, smooth idle,no
misses. this has to be the ecm dosnt it. my gm mechanic doesnt even know
what it is. |
|
| Back to top |
|
 | |
External
Since: Jan 29, 2005
Posts: 148
|
(Msg. 2) Posted: Tue Jan 09, 2007 6:21 am
Post subject: Re: 93 chev k2500 suburb 7.4 tbi [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
superbee wrote:
> new motor ,map,tps,o2,speed sensor,shift solinoids, new dist.cold start
> engine, no cold loop,(idle only about 750)engine light on,(code 42)holds
> on to shift points,no misses, go for a drive, stop, turn off, restart
> engine, idles normal but begines to miss with tach spike not neccasarily
> corrisponding to spike,(like voltage spike, from 750 to 2000 on tach)no
> engine light,miss is severe enough to almost kill engine
> (very sharp misses,like voltage from distributor dropping off),turn off,
> restart after ten minutes engine light back on, spike gone, smooth idle,no
> misses. this has to be the ecm dosnt it. my gm mechanic doesnt even know
> what it is.
>
Start with going to someone that has a OBD1 Scan Tool. The scan tool
will show sensor readings not just the trouble codes.
Charles |
|
| Back to top |
|
| |
External
Since: Jan 09, 2007
Posts: 2
|
(Msg. 3) Posted: Tue Jan 09, 2007 1:25 pm
Post subject: Re: 93 chev k2500 suburb 7.4 tbi [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
i have a mechanic that works at a dealer with the scanner, hes comming over
on saturday but last time we scanned it ther were questions on exactly what
all the different dc voltages(.6 to 5)should or should not be. trying to
find someone who can actually troubleshoot these readings is like finding
a needle in a haystack. i dont think the tool tells you what the different
voltages should be.i guess ill try to write the readings down and post them
so i can get one of you F1 mechanics out there to tell me what they mean.
SUPERBEE >> Stay informed about: 93 chev k2500 suburb 7.4 tbi |
|
| Back to top |
|
| |
External
Since: Jan 27, 2006
Posts: 67
|
(Msg. 4) Posted: Tue Jan 09, 2007 6:19 pm
Post subject: Re: 93 chev k2500 suburb 7.4 tbi [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
|
|
|
while most guys who do this for a living most likely know most of the
acceptable ranges for the various sensors.... the shop manual for that
specific truck lists all that type of information. Most of the time
if the sensor is out of range it will set some type of code in the
ECM.
On Tue, 09 Jan 2007 13:25:33 -0500, "superbee" <kel4rog.RemoveThis@earthlink.net>
wrote:
>i have a mechanic that works at a dealer with the scanner, hes comming over
>on saturday but last time we scanned it ther were questions on exactly what
>all the different dc voltages(.6 to 5)should or should not be. trying to
>find someone who can actually troubleshoot these readings is like finding
>a needle in a haystack. i dont think the tool tells you what the different
>voltages should be.i guess ill try to write the readings down and post them
>so i can get one of you F1 mechanics out there to tell me what they mean.
>SUPERBEE
-----------
Elbert
ask.RemoveThis@me.com >> Stay informed about: 93 chev k2500 suburb 7.4 tbi |
|
| Back to top |
|
| |
| Related Topics: | 1995 K2500 idle - We have a 1995 Chevy K2500 that my daughter has been driving. Yesterday it began have an idle problem. It started fine and idled OK, but when she put it into gear, it idled roughly and died. I looked at it today and sometimes it idles OK in P or N, but...
88 k2500 Trouble code - I am getting code #43 under hard acceleration. There is knock or rattle first then the light comes on. Does it sound like the knock sensor? I just put a small fortune into the truck so I want it to run right but I don't want to waste money on parts.
1993 Chevy K2500 still rough hot and dies - I'm still having problems with this truck. It's a 1993 K2500 with the 5.7 motor. It runs OK when it is cold, but is rough and will die when it's hot. It's worse idling in gear than out of gear. It's rough, but doesn't die when I'm driving at speed,..
rust in bed of '93 k2500 suburban - I pulled up the carpet in the back of my suburban and found that while most of it was in pretty good shape, there was some rust that was allowing water in. There appear to be two points of concern: There is a cross-member spot-welded to the underside of...
93 K2500 Suburban 5.7 - stalls at idle - I just finished replacing the fuel pump (it was delivering only 4lbs) and it now is giving me a consistent 10lbs of pressure, and now at cruising I have no performance problems. I also replaced the cat and the muffler with a straight pipe and muffler, an... |
|
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
|
|
|
|
|
|
|
FAQ
Profile
Private Messages
Log in
