TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
Welcome to ThirdGen.org!
Welcome to ThirdGen.org.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, join the ThirdGen.org community today!
WTF!! I keep having to replace the diaphragms in my FPR (gas pours out of vacuum line). I had a BBK AFPR and went through two diaphragms. I then installed a Holley AFPR and am going on my third, with less than 1K miles on it. Before installing the last one I filed the inner edges thinking it might be rubbing. I was obviously wrong. The leaks are around the center ring, it looks like it stretches and finally pulls out from around the ring (metal center piece). Any ideas of what could be causing this?
Thank you for any input.
__________________ 355 - TPI, Edelbrock High Flow intake and runners - ported/polished. 24# injectors, Crane Cam, Air Foil, Cold Air Intake, Moates 4mb Prom adapter w/remote, Edelbrock Headers, Gale Banks 3" Cat Back, 3.70 - 9 bolt BW Rear, Spohn lower control arms, Poly Carbon bushings all around, K&N Filter, MSD 6AL Ignition, Coil and Wires, 4th Gen R-Spoiler, B&M Mega Shifter, Crane AFR, TD "Wonderbar", SFC's, 2000 Z28 leather seats
I had a Holley and it did the same thing. After replacing the diaphragm 3 times I gave up and bought a Crane AFPR. It uses a stock FPR diaphragm, and did not leak, but mine won't adjust to any level lower than 50psi.
plugged return line. The way out pressure regulator system works is the pump produces a large amount of unregulated pressure and its the pressure regulators job to bring it down to an appropriate level. It does this by bleeding off some pressure back to the tank. however if the return line is blocked it han no where to go but through the fuel pressure diaphram.
