Ok, ive been trying to figure out my knock problem for a while now, and now I know the problem. I hooked up an oil-filled guage to the fuel rail, and just went for a spin. Idle fuel pressure PSI (line off) is set at 44 psi. When I hit any amount of boost, whether it be 5 psi or 15 psi, the pressure on the guage does not rise at all!
I have a new walbro 340 pump, new adj. fuel pressure regulator (an accufab one), and a fairly new gas filter. When I dropped the tank to replace the fuel pump (my car was sitting for 6 years), unbelieveably there was not one piece of rust in the tank, which leades me to believe that there is no rust in my fuel lines. I also have used MSD 50s on the car.
What can the problem be? I dont get any knock (surprisingly) until about 15 psi (about 4-7 degrees).
Can it be the injectors? Clogged fuel filter? Clogged fuel rail (with rust possibly)???
I have a new walbro 340 pump, new adj. fuel pressure regulator (an accufab one), and a fairly new gas filter. When I dropped the tank to replace the fuel pump (my car was sitting for 6 years), unbelieveably there was not one piece of rust in the tank, which leades me to believe that there is no rust in my fuel lines. I also have used MSD 50s on the car.
What can the problem be? I dont get any knock (surprisingly) until about 15 psi (about 4-7 degrees).
Can it be the injectors? Clogged fuel filter? Clogged fuel rail (with rust possibly)???