My c2500 keeps blowing the INJ A+B fuse any ides why?

Asked by Apr 09, 2017 at 06:51 PM about the 1991 Chevrolet C/K 2500 LB RWD

Question type: General

Was going home from work truck started running rough then quit, found the INJ A+B fuse blown, I changed it and it blew again when I tried starting my truck. It has something to do with my TBI

3 Answers


Either there is a bad wire, wire connector at the fuel injectors, or the injectors are no good. Unplug the 2 injector connectors, have a good fuse in, and see if it blows. If it does then there is a wiring problem and it more than likely up by the TBI. Those wires get real brittle.

1 people found this helpful.

Thanks for the input. I went out today and with a brain fart just tried to start my truck without pulling the tbi connectors and it started right up without blowing the fuse, but only one tbi injector is working so I'm closer thanks for the inf. I did pull the connectors after word and they are both getting the same voltage so I'm hoping I'm good there and don't have to track down a bad wire.


Sounds like a injector is not working if you don't see fuel coming out of one, and there is a injector pulse for the other.

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