Fuel pressure is set at 4o psi on an adjustable FPR, with the vacuum line disconnected & plugged. When the vacuum line is connected, fuel pressure should drop to 30-35 psi at idle with 20-22 inHg vacuum. Mine doesn't drop at all. Diaphram is not torn or leaking. It holds vacuum properly with my hand vacuum pump. It was not a problem with the old fuel pump which would only supply pressure at idle. The new pump is a 255 lph high pressure Walbro in-tank pump (GSS-342). Can a 2 year old Kirban just wear out?
Everything is reporting a fuel rich condition: EEC bad codes (HEGO's out of range), poor engine idling, exhaust popping, my nose, my ears.
I had a Mallory AFPR working with no problem for 15+ years. It needs a new o-ring. The Ford one might go back in, it needs a new o-ring, too.
Everything is reporting a fuel rich condition: EEC bad codes (HEGO's out of range), poor engine idling, exhaust popping, my nose, my ears.
I had a Mallory AFPR working with no problem for 15+ years. It needs a new o-ring. The Ford one might go back in, it needs a new o-ring, too.