Tbi injector overflowing with fuel

Maria Reyes

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

Andrew Olsen

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

Maria Reyes

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

Andrew Olsen

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.
Maria Reyes

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.

Andrew Olsen

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

Maria Reyes

Yeah I will replace and let you know.

Maria Reyes

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.

2 out of 2 people think this is helpful.

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