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2014 Chevy Silverado
Platform: Truck, GMT 400, 800, & 900

fuel injector voltage?

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Old Apr 4, 2009 | 12:31 PM
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Scootertrash's Avatar
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Default fuel injector voltage?

97 Chev 5.7 vortec. How may volts should I have at the injectors?
Thanx!
Scooter
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Old Apr 5, 2009 | 12:17 AM
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From: preston, idaho
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i would say no lease then 12 volts
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Old Apr 5, 2009 | 8:00 PM
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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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Old Apr 6, 2009 | 9:33 AM
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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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Old Apr 6, 2009 | 10:54 AM
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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.
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