I connected a fuel pressure tester from autozone to the Schrader valve.Please clarify that last post. What never moved from zero if you had no gauge?
What was your test procedure?
All the newer pumps have no anti-drainback. The best solution is a fuel pressure regulator with the anti-drainback feature. Kirban is the only one I am aware of which has this feature.I connected a fuel pressure tester from autozone to the Schrader valve.
Update: after dropping fuel tank to make sure the seal around the filler neck was sealing i pulled the pump out of the tank. And replaced it with a new one. Which means. I have an intank fuel pump and an external pump bolted to underside of rear bumper. The car has 40psi at schrader valve now and the car start right up.
Once i turn the car off the pressure does not hold. It drop right too zero.
I bought the car as a roller and the previous engine was a turbo engine. Not sure about turbos. Do i need both pumps? It no longer has turbo 302 B cam explorer heads and intake
Thank youAll the newer pumps have no anti-drainback. The best solution is a fuel pressure regulator with the anti-drainback feature. Kirban is the only one I am aware of which has this feature.
My Kirban does not have an anti drain back valve. It goes to zero almost emmediatly after cutting off have to turn key forward twice before cranking to start.
Unfortunately, I have nothing to compare to. My pump was replaced in 2015 when I installed this set up. I believe it's a 255lph...or 340lph walbro. ( would have to check my thread ). I thought I had an issue at first and did several checks on the fuel system. Even contacted the place I bought it from and Kirban. The pump was holding pressure, the diaphragm was OK inside the Kirban, no leaking injectors. I did some quick research and found several people with Kirban and the same issue. I deemed it normal. They were going to send me a replacement but I canceled it. If I plugged the return line the fuel pressure held for a while. The pressure was bleeding off through the regulator out the return line.Mine did the same thing when I had the original pump. As soon as you turn the key to off, the pressure would drop. However, I never had an issue starting the car. I cycle the key, let it prime for a second and then start and it would fire up. Drove this way for 10 years?
I changed the pump to a Walbro 190lph a couple years back, not the car does hold pressure when I turn the key off. It will slowly bleed off, but it will take 5 mins or so to do this. Eventually it does drop to 0. I did buy that pump back in 2005/2006 though, so no idea how that compares to the new Walbros.
The proof is in the picture.My Kirban does not have an anti drain back valve. It goes to zero almost emmediatly after cutting off have to turn key forward twice before cranking to start.
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