83Starion-11 Posted March 10, 2014 Report Share Posted March 10, 2014 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 Link to comment Share on other sites More sharing options...
scott87star Posted March 10, 2014 Report Share Posted March 10, 2014 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. Link to comment Share on other sites More sharing options...
ZacMan Posted March 10, 2014 Report Share Posted March 10, 2014 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. Link to comment Share on other sites More sharing options...
83Starion-11 Posted March 10, 2014 Author Report Share Posted March 10, 2014 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? Link to comment Share on other sites More sharing options...
MikeMeyerhoff Posted March 11, 2014 Report Share Posted March 11, 2014 There is a return line and a pressure regulator that prevents excess fuel pressure. If your return line is clogged then yes, fuel injectors clogged then no. Link to comment Share on other sites More sharing options...
ZacMan Posted March 13, 2014 Report Share Posted March 13, 2014 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. Link to comment Share on other sites More sharing options...
83Starion-11 Posted March 26, 2014 Author Report Share Posted March 26, 2014 ZacMan, I was able to get the exact O-rings for the car from the list, and just put them in yesterday, and no leak anymore! The injectors look to be flowing well. Thank you! -Andrew Link to comment Share on other sites More sharing options...
markhansenconquest Posted March 27, 2014 Report Share Posted March 27, 2014 Throttle shaft seals .....look to be the same as 86-89 .. Talk to brian from LSP has new ones......... 1buck each plus shipping ...ask brian if they will fit.....and get o -rings for gas inlet flange.....if u don't replace .... will allways have a leak.... Link to comment Share on other sites More sharing options...
ZacMan Posted March 27, 2014 Report Share Posted March 27, 2014 Awesome news! The throttle shaft seals are the same between the two types of injection mixer. Link to comment Share on other sites More sharing options...
markhansenconquest Posted March 27, 2014 Report Share Posted March 27, 2014 Glad to help u out.........I"ve rebuield 3 TBs and they have all needed them ........(cooked from time and heat) Link to comment Share on other sites More sharing options...
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