fuel injector voltage?

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April 4th, 2009, 12:31 PM

Scootertrash

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fuel injector voltage?

97 Chev 5.7 vortec. How may volts should I have at the injectors?
Thanx!
Scooter

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April 5th, 2009, 12:17 AM

89silverado283

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i would say no lease then 12 volts

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April 5th, 2009, 8:00 PM

shawnvw

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should be battery voltage with the key on, and a flashing ground when it runs
DO NOT TEST WITH A TEST LIGHT!!!!!!!
you can fry the ECM

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April 6th, 2009, 9:33 AM

Scootertrash

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Quote:

Originally Posted by shawnvw

should be battery voltage with the key on, and a flashing ground when it runs
DO NOT TEST WITH A TEST LIGHT!!!!!!!
you can fry the ECM

Nope, wouldn't test with a light, seems I've heard that somewhere before. I would buy a noid for testing. I was just curious as to how many volts was spose to be there. I'm getting to the point where I think my ECM may be toast anyways.
Here it the thread on the issues with my truck:

https://chevroletforum.com/forum/silverado-sierra-fullsize-pick-ups-21/i-could-really-use-some-help-truck-wont-start-21707/

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April 6th, 2009, 10:54 AM

therewolf

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DNK if this pertains to your injectors or not, but the newer Haynes manual (99 thru 05) says to use a stethoscope(a long-bladed screwdriver as a substitute) to listen for clicking at each injector.

Step one says check all electrical connectors for tight connections and bad grounds.