1995 Chevy Cheyenne idle or fuel prblem

1995 CHEVROLET CHEYENNE
145,000 MILES • 6 CYL • 2WD • AUTOMATIC
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BMAC66
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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.
Apr 16, 2010 at 10:35 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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RASMATAZ
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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
Apr 17, 2010 at 6:42 AM
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BMAC66
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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
Apr 20, 2010 at 12:30 PM
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RASMATAZ
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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.
Apr 20, 2010 at 3:02 PM
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BMAC66
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trying a new fuel pump last straw . Thanks
Apr 20, 2010 at 6:31 PM