Fuel Pressure Drops with boost??
(1990 5.0) I just installed my new S-trim kit, got the t-rex, 30# injectors, rpm 2 upper lower intake, 70mm TB, 190lph intank. I'm not sure what my problem is, but whenever i go to get on the car and boost starts to kick in, i lose fuel pressure and the car breaks up and loses all power. I tested the FMU because i assumed it was junk, but it's working correctly (or at least appears to be). I thought maybe the T-rex is messing up, but i can hear it and feel it and it's on and hooked up correctly, so i wouldn't think it's not working. The only other thing i can think of is that i probably need colder plugs, but that still doesn't fix the fuel issue. Also has anyone had their BTM just catch fire 10 minutes after install? I have no idea what happened there, you can't even hook that thing up wrong so i'm calling MSD about it tomorrow because i'm screwed without being able to retard the timing. Can someone please help me. Thank you.
i had fuel pressure set at 40, and it sat around 30 with vacum hooked up, and i moved it to 50, which sat it at 40 with vacuum and it still does the same thing. when i smash the throttle The car jumps from 40, to 50psi and then drops like a rock. I also thought maybe the air filter was turning inside out, and i took it out and tired it and it worked better, but then i tired it again like that and it still does it, i must have just got lucky. it breaks up around 3000 and above rpms.