[Decimus]

Ever since installing a DW300 fuel pump, DW 700cc injectors, Delicious Flexfuel kit w/ Mk1+ upgrade and my Greddy turbo kit ive been having random fuel pressure drops. Pressure will drop to 30+psi when im shifting low gears or slowing down to a light with foot off the gas. Tuner says the logs show a loss in signal/intermittent drop in pressure.

No problems with WOT logs, all values looking perfect. All with exception to this fuel pressure drop.

Ive read people say its the fuel regulator going out or dirty/kinked fuel sock stopping pressure. Anyone else have an idea what it may be?

The problem doesnt occur when im above 3k rpm or WOT. Only when im in low gears and in stop&go traffic. Problem exist when I’m using 91 or E85. The car also lurches back and fourth when this happens (kinda like if i was to step on the gas and let off repeatedly for one or two seconds). I also checked for vaccum leaks and all seems to be good.