I have a broken circuit on one of my injectors

CARNACHIEF

MEMBER
1991 GMC SONOMA
145,000 MILES

I have a 91 sonoma with a 2.5 tbi injection, the ground side of the injector keeps breaking circuit, if I make a quick ground tap to it it will shoot some fuel and run some days it dont quit running at all and some it does it alot where could the short out could it be the computer

Friday, October 28th, 2011 AT 12:57 PM

4 Replies

HMAC300

MECHANIC
48,601 POSTS

Need more details

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Friday, October 28th, 2011 AT 2:14 PM

CARNACHIEF

MEMBER
3 POSTS

It died one day on me and I was told to check for power and ground at the injector it had the power side but the ground was not there I put a wire in the ground side and touched it to the negative terminal, it shot fuel and started and continued to run so now I have that wire run into the cab so when ever it dies going down the road I tap it on the metal of my emergency brake and it will fire back up and run, oh yea it is a 5 speed

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Friday, October 28th, 2011 AT 9:53 PM

CARNACHIEF

MEMBER
3 POSTS

I stuck a wire in the ground side of the injector and touch it on the frame every time it dies, it shoots fuel in and will run again

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Saturday, October 29th, 2011 AT 1:18 PM

HMAC300

MECHANIC
48,601 POSTS

If you have the distributor and I think you do, these reluctors would go bad and cause problems. That is where the fuel injection gets it signal from the dist. So you could check that out as well as the wires going to the injectors get lose and lose conection.

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Sunday, October 30th, 2011 AT 2:14 PM