- Jun 14, 2021
- Reaction score
I’ve posted on here previously with my car still having the same issue, I’ve been tinkering on it when time allows and have thrown some parts at it trying to fix it, known ford mechanic suggested trying to no avail. My issue when driving like granny the car is perfect, when getting on the throttle mildly aggressive it just kinda falls on its face but let off and be normal on throttle and it’s fine if you very slowly roll into the throttle and have a long time to get up to fast speed it seems ok, but anything over mild acceleration and it spits and spudders. I’ve tuned up with new plugs and ford racing wires, new fuel filter and air filter. Installed exhaust from headers back with off-road x pipe and Pyle cat back, due to no exhaust when buying car. I’ve just recently installed new mass air flow sensor and both o2 sensors. I’ve checked ccrm relay with new same issue. I’ve tried a new tfi thats mounted next to the air box same issue and tested mine like 15 times and found good.I checked timing with the spout out and found around 12degrees before tdc. I couldn’t say if the dizzy was good so I put a new one in it and assure all timing was correct same issue. I’ve checked fuel pressure and found 38 psi and 40 with regulator unplugged. I’ve done all I know and my buddies know of doing, so dropped it at the local ford guys shop and that’s why there’s a new mass air flow sensor and new o2 sensors on it, I think he dont want to work on it so I’m back to square one. I’ve checked codes it has the normal air codes due to removal of air pump and all, and the 556 code fuel pump primary circuit failure which I cannot figure out how it failed if I have correct fuel pressure. I need some help Im just before carb swap, but wish to remain fuel injected. Any direction or things to possiably check.