blue07gt500clone

First things first, I have the Saleen 550 supercharger kit on my 07 gt. My fuel pressure runs at 30 psi at idle and jumps to 35-40 psi under part throttle accelleration. The problem I'm having is that at WOT it shoots to 40-45 psi then drops down to 20 psi just short of redline. The car has the saleen extreme dual fuel pumps on it which, aparently are different from the gt500 pumps, instruction-wise anyway. One of JDM's mechanics walked me through the install on the phone, so as far as I know it is installed correctly. What else could be causing this problem? I dont wot anymore for fear of blowing up the engine. Any help would be great.

moosestang

Did you ask jdm if that is normal? I know nothing of those pumps, but a leak inside the tank would cause the pressure to reach a certain point and go no futher, not drop off at redline.

blue07gt500clone

JDM said that this is not normal. They seem to think that the pump is hooked up wrong and are sending me their instructions. But if it were hooked up wrong you would think that it would have this problem all the time, not just at WOT. I wonder if my O2 sensors are bad and giving off a faulty reading at WOT. Thats the only other thing that I can think of.