1995 Chevy Cheyenne idle or fuel prblem

Tiny
BMAC66
  • MEMBER
  • 1995 CHEVROLET CHEYENNE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
My 1995 chevy 1500 v6 pickup all of a sudden started losing power and sounded like it was starving for gas it would just buck and at idle would go from low to high ghigh to low and service engine lite would come on. Not sure if its a bad fuel filter vacume leak or egr valve can't figure this one out. Low idle then high idle only will go 5 miles an hour on flat ground please help.
Friday, April 16th, 2010 AT 10:35 PM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You need to scan the computer for code/s this is your starting point of diagnosis finding out what's causing the MIL to come on.

Try cleaning out the idle air control valve/EGR and PCV valves and test the throttle position sensor and manifold absolute pressure sensor. Also check if the catalytic converter is clogged-up
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Saturday, April 17th, 2010 AT 6:42 AM
Tiny
BMAC66
  • MEMBER
  • 3 POSTS
They have checked everything and still nothing has changed. New plugs wires cap roter fuil filter. Manifold gasket. Starts then stalls I put a heater core in last week but it seemed to run fine for 2 days then this happened. The code was 44 lean eshaust. Whatdoes that mean. Thanks
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Tuesday, April 20th, 2010 AT 12:30 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Lean fuel condition could be caused by one of the following below:

1. Vacuum leaks
2. EGR and PCV valve.
3. Low fuel pressure.
4. Dirty fuel injectors.
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Tuesday, April 20th, 2010 AT 3:02 PM
Tiny
BMAC66
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  • 3 POSTS
Trying a new fuel pump last straw. Thanks
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Tuesday, April 20th, 2010 AT 6:31 PM

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