89 c1500 5.7 injectors over spraying causing motor to bog down

Asked by Louis May 02, 2021 at 01:34 PM about the 1989 Chevrolet C/K 1500 Silverado RWD

Question type: Maintenance & Repair

what could cause injectors to over spray. have new injectors, idle air, map
sensor, egr valve, fuel pump, has been rewired, and throttle position sensor.
went as far as to change ecm. i need help badly

3 Answers
27,570

oilyspill answered 3 years ago

Did you check fuel pressure? 9--13 psi, you'll have to tee gage into supply line. Your local auto store should have what you need for checking fuel pressure. If fuel pressure too high, check return line. Also, check coolant temp sensor, I'm not saying replace it, don't replace anything unless your testing points in that direction. Can you check for applicable trouble codes? Does your check engine lamp still work? As far as coolant temp sensor, take connector loose, use jumper wire between the two terminals on electrical connector, then start, it should make computer think, the engine is hot and cut back on the fuel. I'm going by what your telling us, the fuel system is running rich for some reason.

Mark helpful

Louis answered 3 years ago

Haven't check fuel pressure. Left out fuel pump is new but I guess that doesn't mean anything

Mark helpful

Your Answer:

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