Having problems with your 1990 GMC Sierra ?

Gas is not gettting pushed through the injectors on the throttle body. Gas is getting through the throttle body, but then it wont go through the injectors. Is this a wiring problem? I cleaned out everything so it shouldnt be clogged.

Posted / edited by AnonymousUser on : 23-04-2018

Answers :

1. Verify power using noid style test light (normal test light will not work)
2. If noid light illuminates when cranking engine the problem is the injector itself.
3. If light fails to flash the problem is electrical (IE PCM).
Repair Help & Product Troubleshooting for 1990 GMC Sierra

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