Hey guys, I'm looking for some advice here as I surely am not an expert on the subject. I have a 2002 L. Has A LOT of mods. Built engine, Stage 3 heads, cams, LT's, Kenne Bell 2.3L. My fuel setup consists of twin Walbro 255s, 60lb Inj, SCT 2400 MAF but I'm using the stock rails, regulator, and the relay is still being used as well as the stock resistor. My problem is only during WOT I experience what seems like some sputtering/missing/hesitation. It only happens during WOT and full boost is reached. I have searched the forums and I know new plugs could fix it, as well as new coils and a fuel filter change. But I jumped all that and did a pressure test for now. At idle I get a solid 39-40psi, and when the engine is revved and up to WOT it only sees a max of 50 psi. So...I removed the pump relay and used a jumper to give the pumps full volts from idle. With that done at idle I see a solid 60psi and when revved I see a max of about 75psi. All this is with the vacuum still attached to the stock regulator. I'm not sure but it seems as though with the relay in use I should see more psi when revved? or am I wrong? Possibly the stock resistor is going bad? I even swapped the relays around and tried a second relay and same results. Only when it's jumped do I see higher then 50psi. If anyone can chime in with anything I should or give any guidance I would defiantly appreciate it. Thanks guys.