Fuel pressure problems

[Flippittyflops]

I have a problem with to much fuel pressure. I do not know why but the fuel is shooting out of the vacume port on the regulator and filling the intake up. My car has simple mods: forged pistons, head main and rod studs, 206/206 hydrolic roller cam, turbo tweak chip, TH 3in dp, quad air 009 injectors, quad air fuel pump, hot wire kit, full throttle billet fuel pressure regulator and stock turbo. I have a 100 lb fuel pressure guage and the guage is pegged past 100 just by priming the system. Then fuel shoots out of the vacume port. Any help would be greatly appreciated. Thank you Kevin

 

[Chrisk]

Bad Regulator? Mabe a hole in the diaphram allowing fuel into the vac line??

 

[Flippittyflops]

Well that may be it the car sat for a while because of the cold weather. This is the 3rd different regulator on the car i'm getting rather frustrated. I dont want to wash the rings out if this problem continues. Thank you for the suggestion

 

[Chuck Leeper]

??

Well that may be it the car sat for a while because of the cold weather. This is the 3rd different regulator on the car i'm getting rather frustrated. I dont want to wash the rings out if this problem continues. Thank you for the suggestion

3 reg failures? Leads me to wonder what's going on w/ the return line??

 

[Flippittyflops]

Thank you for the suggestion. We have had the tank out 2 or 3 times could you tell me which line is the return line to see if we have plugged it oh the car is a 86. Thank you for all the help Kevin

 

[turbofabricator]

It could be that you swapped the return line for the vent line at the tank. The vent line has a VERY small restriction in it (which by they way can cause fuel starvation on HIGH hp cars with double pumpers in tank) and might not be allowing enough fuel to return. Drop the tank, and pull the sending unit and make sure the return line goes to the tube that goes to the bottom of the tank (pump hanger). Also, blow air through the return line at the fuel rail and see if it has suffecient flow at the back of the car. (with the tank out) Be SURE to use a good sized catch can to catch the gas as it is blown out. DO NOT look directly into the fuel line while your buddy blows compressed air through the line coming out of the bottom of the regulator. :biggrin: Unless you use a BIC lighter to see what you are doing.:biggrin:

 

[Flippittyflops]

I want to thank everyone for all of your suggestions. Last nite my dad and I pulled off the return line at the fuel rail and it was under a lot of pressure. We came to a conclusion that the return line is plugged so tonite we are going to replace the return line with some braided line. For some reason we never checked the lines before we fired the car up. It was a project car that sat outside for about 8 years before I bought it. Then sat another 5 years before we got it running. Thanks again everyone for all of your help it is greatly appreciated Kevin