SPONSORED LINKS

1996 Pontiac Sunfire Engine stalls

Tiny
DONLEY
  • MEMBER
  • 1996 PONTIAC SUNFIRE
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
Engine runs for about an hour with no problems, after that the engine smothers out. When the accelerator is pressed it smothers. When you get off the accelerator it will idle for a minute & then die. It will restart immediately & run for 2-3 minutes and smother out again.
Have replaced the alternator, crankshaft & bearings, all 4 coil packs, spark plugs & wires, timing chain & gears, MAP sensor, Idle sensor, O2 sensor, fuel filter.
The head & valves have been reworked.
The fuel pump tested OK for pressure.
The catalytic convertor is free flowing.
SPONSORED LINKS
Thursday, July 16th, 2009 AT 9:49 AM

3 Replies

Tiny
STEVEW84
  • MECHANIC
  • 673 POSTS
Do you have any codes in the PCM? What was your fuel pressure when the car would smother out? What are your fuel trims at when the car is smothering?
Was this
answer
helpful?
Yes
No
Thursday, July 16th, 2009 AT 10:02 AM
Tiny
DONLEY
  • MEMBER
  • 2 POSTS
Sometimes it shows a code and sometimes it dont but has no effect on how the motor runs. And I have no idea what the fuel pressure or trim is when it smothers. Normally the pressure 50 psi. How do I make a contribution?
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Thursday, July 16th, 2009 AT 1:42 PM
Tiny
STEVEW84
  • MECHANIC
  • 673 POSTS
Check what the code is. Hook up a fuel gauge and see what the fuel pressure is when it runs like crap. Get a scanner that can read data and you will see STFT-Short term fuel trim and LTFT-Long term fuel trim. Tell us what those are. Its a good start.
Was this
answer
helpful?
Yes
No
Thursday, July 16th, 2009 AT 2:06 PM

Please login or register to post a reply.

Related Engine Stall While Driving Content

Is it Safe to Drive Check Engine Light?
VIDEO
Is it Safe to Drive Check Engine Light?
Instructional repair video
Engine Stalls While Driving
GUIDE
Engine Stalls While Driving
An engine that stalls while driving and then starts back up again, either immediately or after a short time is different from an engine that just wont start or if the...
VIEW MORE

Sponsored links