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1991 Chevrolet Corvette ZR-1, ECM/Inputs/Outputs Waveform
Posted to the Waveform Library on 2/10/2011

Bottom Trace = Secondary injector current Top Trace = #1 Injector signal - sync

The secondary injectors can be turned on with the Tech1 for testing. #1, 8, 4 & 7 injectors are shorted. Vehicle was equipped with the Multec injectors from the factory. Vehicle received 16 newer style Bosch injectors. Vehicle had a couple of injectors that had been replaced recently. Whenever you run into this situation it is usually best to replace all injectors and do not go back with the Multecs!

Scott Brown
Connie & Dick's Service Center
Claremont, California, USA


car Vehicle Data

1991 Chevrolet Corvette ZR-1 5.7L

Engine5.7 L / 8 cyl / GAS
Trans6-speed StandardTransmission
DeliveryFuel Injection
ConditionKnown Bad