Hmmm...
I've never used an APS valve, but a decent aftermarket valve shouldn't have problems with 19-22psi, nor is fuel cut common at those levels.
Have you checked the line to your boost gauge for kinks or leaks?
At this point put the boost control system back to stock (all lines correctly connected, with all restrictor pills etc) and take it to the dealership. This is what they are there for, to fix problems that are not caused by the owner or by modifications he has done. If your modifications didn't cause the problem this is the time to get the dealership involved to solve the problem.dr0wningless0n5 said:yea i spent half the day yesterday with my car on the lift putting everything back to stock
same problem still
im running 15 psi because if i turn it up any more than that it spikes then i hit fuel cut
i put everything back in and i still had the problem so now im just lost![]()
Aha, if you are hitting fuel cut at anything over 15psi, then there is a definite problem elsewhere. You shouldn't hit fuel cut unless you're up closer to 24-25psi or so. You can't get enough airflow below 20psi to cause fuel cut, so that's weird. I suggest doing what Keith said and re-installing the factory boost lines...not just any vaccuum lines...the EXACT FACTORY BOOST lines with the 2 restrictor pills.dr0wningless0n5 said:yea i spent half the day yesterday with my car on the lift putting everything back to stock
same problem still
im running 15 psi because if i turn it up any more than that it spikes then i hit fuel cut
i put everything back in and i still had the problem so now im just lost![]()