1993 Chevy 1500 with 5.7 is dumping fuel at idle
1993 Chevy 1500 with 5.7 is dumping fuel at idle
We have a 1993 Chevy C1500 with a 5.7 that is dumping fuel at idle. We've put new injectors in it, new map sensor, O2 sensor, air control sensor, temp. sensor, new computer & chip, EGR sensor, Pickup in distributer, new distributer wires, new cam, lifters, timing chain & gears, fuel pump,& top end of throttle body. We've taken it to Sands Chevrolet & Gateway Chevrolet and nobody can find the problem.
Re: 1993 Chevy 1500 with 5.7 is dumping fuel at idle
Sounds like a grounded wire for the injector circuits.
PCM controls the ground. If the ground circuit is shorted out somewhere, that would cause the injectors to be open all the time.
PCM controls the ground. If the ground circuit is shorted out somewhere, that would cause the injectors to be open all the time.
Re: 1993 Chevy 1500 with 5.7 is dumping fuel at idle
Disconnect the ground wire at the injectors and the ECM. Test that wire for being shiorted to ground. If it is not, then the ECM is bad.
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