Ive just got v7 which has been completely rebuilt, It was running fine for a month or so and has now started stuttering out of the blue, usually when boosting over 10 psi. It also likes stalling after driving it hard and being stopped at the lights.
First off I replaced the fuel pressure regulator to a high end aeromotive as the previouss one was reading 43psi even with -20 psi boost through it.
The new reg now reads around 37 psi when at idle which seems more promising. It now seems to stutter a lot less and idle a bit smoother (previously it was hunting all over the show until it stalled).
This hasnt fixed the problem, so now ive put new spark plugs in it, still the same.
What ive noticed is that when setting the pressure on the regulator it only holds pressure for a second. I literally had to get some one to sit in the car to keep priming the fuel pumps so i could set the pressure before it would fall to 0 psi.
So is this a problem? As when i turn off the car Im mmedialtely reading 0 psi fuel pressure on the regulator, is it because im running a surge tank?