Won't stay running

Tiny
MDFELGEE
  • MEMBER
  • 2001 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 190,000 MILES
Car will turn over but won't stay running we changed fuel filter, spark plugs / wires, MAF sensor, and ignition module checked out
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Monday, October 20th, 2008 AT 6:01 PM

5 Replies

Tiny
RENAUDTN
  • MEMBER
Is your fuel pressure good?
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Tuesday, October 21st, 2008 AT 9:29 AM
Tiny
MDFELGEE
  • MEMBER
Fuel pressure checked out at 55 psi we also shoot it with starter fluid and still got nothing
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Tuesday, October 21st, 2008 AT 10:29 AM
Tiny
RENAUDTN
  • MEMBER
Check for vacuum leaks (especially around the intake gasket, they're bad on this type of engine).
Also, check your IAC valve, MAP sensor, oxygen sensors, EGR valve.
You could also have dirty injectors.
If you have a scanner, and your car runs long enough, do the following: check your Short Term Fuel Trim (STFT) and Long Term Fuel Trim (LTFT) values. It should be between -8 an +8. If you have values greater than 10, your engine is running lean. At this point, rev the engine to 1500-2000 rpm for about one minute and check your values again: if your STFT drops down to a normal reading, you have a vacuum leak. If it doesn't change, you would likely have a problem with your fuel delivery, which in your case could be dirty injectors since you replace the fuel filter, and your fuel pressure is good.

Do you have any codes/pending codes?

Okay, I have to ask: you said you sprayed starter fluid; you would do that only if a car doesn't crank over to figure out what's missing (spark or fuel); I thought the car was actually cranking over and then stall. Do you mean that it does not even crank over?
If the car doesn't crank over, have you checked for sparks when you're cranking the car?
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Tuesday, October 21st, 2008 AT 3:42 PM
Tiny
PIERREKKK
  • MEMBER
Car will not stay started. Only stays running if I am holding down the gas pedal. I change fuel pump/fuel filter/spark plugs/wires and plugs/fuel injectors/battery/alternator.
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Saturday, August 25th, 2018 AT 12:33 PM
Tiny
KEN
  • ADMIN
These cars had a big problem with the crankshaft angle sensor which go out all the time. We should run the codes though. Here are two guides that will help get started and the location of the sensor:

https://www.2carpros.com/articles/crankshaft-angle-sensor-replacement

and

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the diagrams (below). Please let us know what happens.

Cheers, Ken
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Saturday, August 25th, 2018 AT 2:05 PM

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