Been having xxxx of time with this MFI on FED. Normally I know nwhat I am doing with MFI, use to be pretty good at it.This sytem has me pulling out the hair mother nature has not taken yet.
Simple or should be a system. First had primer system feeding fuel at idle by pulling fuel thru pump and poppet. Fixed with a solenoid that opens only when the pump is on. The bad part I had it idling and super crisp. But extra fuel meant BV setting junk. Now having an issue with bv, but that is just tuning.
Two possible problems.Once the main fuel line seems very soft at cpl points and can see if being sucked shut. Which might explain that even when bv is close it stumbles at higher rpm when esasing into throttle. Second one I am questioning is filter placement. One of FIE's with 10 inlet and outlet. Thinking might be an issue when rpm has pump pulling or trying to pull more fuel. I know with lot of pumps restriction on suction will kill performance of pump alot more than a restriction on the discharge side. Thoughts on both or either causing rough stumbling when bringing rpm up.