I am having fuel cut issues between 12 and 13 PSI. It all started after the GM MAF, 3 inch exhaust, front mount, and 255 fuel pump. I have boost leak tested it and it holds boost for about 20-30 seconds. It does have a few small leaks that I can't fix. I've replaced the fuel filter and have changed the plugs. The old owner said that he replaced the caps in the ECU but I haven't checked yet. Do you guys have any clue what could be going on? Any info would be great!