1987 GMC S15 engine trouble

1987 GMC S15
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CHRISDC470
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Engine problem
1987 GMC S15 V6 Two Wheel Drive Automatic 160000 miles
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when you slowly rev the engine it dies down and cuts off had the spark plugs and wires changed new distributer cap, roter button, new injectors, new o2 sencer idle positoining switch,the ecm valve and a few other parts,the engine runs fine at a high rmp if you floor the gas but when you let off it cuts off in the low idle speeds...if you have any sugestions please reply. could this be in the distributer
Dec 5, 2007 at 12:35 AM
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PEAR69
  • ASE Certified Mechanic
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How about the fuel filter? ECM valve, what does that look like? And tell me all the parts you changed and why you changed them.
Dec 5, 2007 at 1:00 AM
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STRAILER
  • ASE Certified Mechanic
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Yep, I was going to say the fuel pump in this trucks go out. Here is the location of the fuel pump and the fuel filter so you can swap them out which should fix the problem. Check out the images (below). Let us know how it goes

Jul 1, 2024 at 12:37 PM
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