4.3 V6, fuel pump and filter new 2 months ago. Original problem was fuel pump. Buddy bugs introduced during diagnosing problem. Got 2 injectors swapped (cyl.#4 & cyl.#6) but got that corrected. Fuel pressure goes to 10psi on initial ignition on, them drops to 0psi. Pressure goes up to 20psi while cranking then (while still cranking) drops to 0psi. Jumper past fuel pump relay (after swapping with known good relay) and fuel pressure goes to 20psi (cranking or not) and goes to 0psi when removed. Any ideas? SWAGS are welcome.
Friday, June 22nd, 2012 AT 6:46 PM