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TBI Leaking from top, at rubber seal...pics included to show where


83Starion-11
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I have a stock 83' which was running great for 5 years, and all of a sudden, my fuel stars to leak out of the TBI...literally coming out like a sprinkler...

 

 

I have taken apart the entire TBI and replaced the gaskets, but there seems to be a ton of pressure on top causing it to spew from the rubber seal...does anyone know why there may be pressure? I have attached a picture, it is the rubber seal on the outside there which I know goes inside, and it is leaking very badly when turning the car over...why is there so much pressure in there to begin with? Could I have bad injectors?

 

 

-Andrew

post-17343-0-06621700-1394410267_thumb.jpg

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There is supposed to be 36 psi pressure, I take it there is. 83's are unique, I have no experience, but I'd start with the o-rings on the top of the injectors.
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Your picture doesn't make it very clear as to where the fuel is leaking from, can you indicate it somehow?

 

If the problem occurred suddenly, I would bet it's the injectors themselves that have begun to leak, specifically where the wiring enters them. There isn't really an easy fix for this, unfortunately.

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Ya sorry, it is right where the wires are going into the TBI for the injectors :/ I am not sure what to do from here...and I have replaced all O-rings on injectors...I read that if the injectors are plugged or bad it can cause pressure to build up and blow out the top?
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You might need to replace more o-rings than just the ones on the injectors.

 

http://prozac.orconhosting.net.nz/eciguide/rebuild.html

 

I'd suggest it's either the 56mm o-ring, or the injectors themselves. I really hope it's the o-ring, as finding good early style injectors is nigh on impossible.

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