1989 Chevy Truck Runs won't stay started

Tiny
NO1DC
  • MEMBER
  • 1989 CHEVROLET TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 100,000 MILES
It start it runs but won't stay start the engine will lope run smooth then almost quit.
It will do this some of the time other times it will die but will restart over no problem.
We check the following they were all fine, timing, egr, fuel pump, fuel filter, pcv.
Injector seem to be spraying fuel you can here them working.
We can't hear any vacuum leaks there new distributer cap and roader bug, alternator and starter !

Was wondering if could be Electronic control module?

It act almost like not get enough fuel but it is !
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Monday, September 1st, 2008 AT 5:25 AM

4 Replies

Tiny
RASMATAZ
  • MEMBER
Check the fuel pressure if okay-start by checking and cleaning the idle air control valve.
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Monday, September 1st, 2008 AT 6:01 AM
Tiny
NO1DC
  • MEMBER
I check them two ideals the idle air control valve.

Was bad but still having the same problem I also notice that doesn't want to shift beside other problems!
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Tuesday, September 2nd, 2008 AT 3:12 AM
Tiny
RASMATAZ
  • MEMBER
What was the fuel pressure readings?

Duplicate the problem or Next time it dies out-do below immediately to determine if its fuel or spark problem

Get a carb cleaner and spray into the carb or the throttle body on an EFI. Did it start and die? If not disconnect a sparkplug wire or 2 and ground it to the engine -have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel problem, check the fuel pressure to rule out the fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil, distributor pick-up coil, ignition control module, cam and crank sensors-
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Tuesday, September 2nd, 2008 AT 5:37 AM
Tiny
NO1DC
  • MEMBER
There rubber hose that inside the gas tank that connected to the fuel pump!
It had small hole in it when the fuel would come out threw the line!
It was only get enough to keep verily running making run so rough!

Did fix more than one problem the check engine light would come on when the engine got warm!
Plus it would start running rough lost of power!

It was the oxygen senor causing that problem!

Thank for all your help!
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Sunday, September 7th, 2008 AT 11:42 PM

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