[RESOLVED] Trouble up top

[kspharris]

Ok so here is what is happening. When I get on it, anything past 10 psi and it starts stumbling pretty bad. I can let off the gas and then get back into it and sometimes it is fine and sometimes it keeps messing up. My current mods list is a little off because I had to strip everything for a warranty repair. So here is my list. Intake, fmic, 255 walbro, 3" downpipe opened before the cat and that is all. I have a aeromotive fpr but have not put it back on yet. I am thinking to much fuel BUT it did not do this before when I didn't have it on and had the 255 in. The warranty work that was done was another motor with less miles on it than the one I have in there now. The old motor never did this. I am looking for direstions to head. Thank you for your help in advance, Keith.

 

[delta448]

Put on the AFPR. Do the boost leak test correctly, remembering to check the intake manifold, TB shaft seals and injectors. Fix the leaks. Drive.

 

[nlzn]

Boost leak is possible.
However having had this happen to my car, have you happened to check the AFR's? You said you had bigger injectors and a 255, it's extremely plausible you're getting way too rich on heavy boost (i didn't see anything listed in your mods to control fuel with.)

 

[kspharris]

Ok, like I said it is not a boost leak and I know how to do them properly. Thank you guys/gals very much for your input. I did figure it out last night. I replaced my plugs with new ones cause the ones in the moter they put in were not bpr6es. The gap on those were .040.... I put in the 6es' and drove my car and it drove fine. It hicupped this morning on the way in a couple of times but I am thinking that it is because I also reset the ecu last night. THANK YOU ALL for your input!!!! You guys are great and so is tuners.