Apr 032012

On a 1988 gmc S-15 pickup with a 2.5 engine, I’m getting good fuel pressure to the carb and power to the fuel injector, but it’s not injecting fuel into the carb.  Am I safe to assume that I’ve got a bad injector? What’s puzzling me is that when I apply 12 volts directly to the injector, I do hear a “clicking” action!

  One Response to “1988 gmc S-15 fuel injector”

  1. The injectors should all have a constant 12 volt power with key on. The injector signal from the computer is done with a negative signal.

    Do you also have spark? or No Spark?

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