Mods are in my signature, heres the story. I had the motor freshened and swapped to a roller cam (thats not in my sig yet sorry). car was running great put about 150 miles on it. couple short runs easing it up to 4~5 lbs of boost no problem. heres where it starts... car was down to about 1/8th tank went to the gas station filled it up, felt it was running good so i ran it up to about 9 lbs of boost this time, no problem at all... about a half mile later though it throws out code 44 exhaust rich. pulled over left it running checked for vacuum/exhaust leaks fluid leaks , anything basically. everything looks fine, went to get in the car and the check engine light was already off so I put about another 50 miles on the car NO boost just cruising on the freeway and the scanmaster erased the code 44 so went home and put the car away... next day (I should emphasize that I did NOT mess or fiddle with anything on the car!) tried to get on the freeway and as soon as the car went into boost it stalled and the check engine light came on briefly and then went off. tried a couple more times same result, If i push the gas too hard it actually backfires through the intake. watched the fuel pressure and noticed it wasnt going above 40lbs. parked the car adjusted the fps to 43 line off(it was around 38lbs before) tried again and it still stalls but what happens is as soon as it hits boost, engine stalls fuel pressure shoots from 40lbs to 45lbs the check engine light comes on and then it backfires if I dont let off the gas. I pulled the fuel pump (Its a denso Supra pump I threw in when Walbro was having their "issues") and the sock is brownish yellow but not collapsed. couldnt see anything in or around the pump. I'm taking a shot in the dark guessing the pump "ate something" but Would it still work fine under vacuum?? and should I be checking anything else? I'm lost at this point.
also car hasnt thrown code 44 since so that may not be related
also car hasnt thrown code 44 since so that may not be related