Tbi injector overflowing with fuel

40

Asked by Feb 12, 2015 at 09:39 PM about the 1990 Chevrolet C/K 1500

Question type: Maintenance & Repair

Injector overflowing with fuel,
recently cleaned tbi system and
partially rebuilt with new o-rings and
gaskets. What could be the problem?

7 Answers

18,225

How is it overflowing? Is it spraying to much or is the fuel leaking out sonewhere?

1 out of 1 people think this is helpful.
40

Leaking over the top and partially spraying underneath along with quick dripping

1 out of 1 people think this is helpful.
18,225

Is it coming from the injector nozzle or somewhere else on the throttle body? It shouldn't come from anywhere no matter the fuel pressure. If it' spraying from the nozzle without the engine turning over then you need a new injector. If it's coming from somewhere on the throttle body then a gasket has failed or somehow the housing cracked.

1 out of 1 people think this is helpful.
40

Hmm- I think I have a bad injector I noticed this when I moved them to their opposite housings. Right bad injector to left housing and left good injector to right housing. This time right housing stayed dry but left leaked. I also noticed that I forgot to lubricate my larger o-rings.

18,225

The o rings cause leaks but it sounds like a leaky injector

40

Yeah I will replace and let you know.

40

Replaced the leaky injector and my truck is running better, although I did notice the engine tremble a little at idle. I also noticed rpm would slightly go down then pick back up to a good idle.

3 out of 3 people think this is helpful.

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