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1989 Volvo 740, Injector Waveform
Posted to the Waveform Library on 7/11/2004

Shows power supply voltage drop as injector is turned on. Injector pattern looks good and no problem would be expected but not enough current was flowing to operate the injector all the time. A DVOM on the supply would not neccessarily pick up the voltage drop...

 

car Vehicle Data

1989 Volvo 740 GL 2.3L

Engine2.3 L / 4 cyl / GAS
Trans4-speed AutomaticTransmission
DeliveryFuel Injection
SubsystemECM/Inputs/Outputs
Component
ConditionKnown Bad

car Vehicle Data

1989 Volvo 740 GL 2.3L

Engine2.3 L / 4 cyl / GAS
Trans4-speed AutomaticTransmission
DeliveryFuel Injection
SubsystemECM/Inputs/Outputs
Component
ConditionKnown Bad