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.

Your Answer

C/K 2500

Looking for a Used C/K 2500 in your area?

CarGurus has 192 nationwide C/K 2500 listings starting at $3,950.


Chevrolet C/K 2500 Experts

  • #1
  • #2
  • #3
    Andrew Olsen
View All

Related Models For Sale

Used Chevrolet C/K 3500
179 listings starting at $4,895
Used Chevrolet C/K 1500
727 listings starting at $2,499
Used GMC Sierra 2500
3 Great Deals out of 161 listings starting at $4,800
Used Ford F-250
401 listings starting at $2,300
Used Ford F-150
2,344 Great Deals out of 215,477 listings starting at $1,300
Used GMC Sierra 1500
722 Great Deals out of 58,462 listings starting at $1,900

Used Cars For Sale

1997 Chevrolet C/K 2500 For Sale
16 listings starting at $3,950
1996 Chevrolet C/K 2500 For Sale
17 listings starting at $4,450

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.