Quote:
Originally Posted by rebc3
hello,
i posted before about working on a 91, 5.7 c-4. what ive done so far is change the fuel pump, fuel filter, o2 sensor, and the CTS sensor. ( owner also changed the MAP sensor and the TPS sensor) the car starts and runs great until it gets warmed up. absoulutly no codes come up any more but the car still cuts off when it gets hot! the only other clue is that right before it cuts off, it will start making a sucking noise that seems to come from the sensor under the throttle body( which also looks new). once this car starts the cutting off thing, it will start several more times but then will not start again for several hours!??
can anyone give any insight to this problem? im almost ready to give this guy his car back for no charge, because i cant fix it! is it possibly the ECM?
HELP!!!
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this is a common problem with multec failure. Get an ohm meter and check each injector. They should read 16 ohms. Do this with the engine hot. If you find any under 8ohms keep it unpluged and try to start. Ashorted injector will shut down the ECU on a 91