[chase_gavin]

So, my issue is as listed above, I'll begin with a mod list. All of which are around 3 and a half months old.

FMIC (no-name)
CircuitSports hotpipe
HKS SSQV3
Megan 3" DP
3" no name exhaust
TurboSmart boost gauge
Walbro 255lph pump

Running z32 fuel filter and NGK plugs with a 6 heat rating (copper) gapped to .032

Tested piping to 20psi and fixed one very minor boost leak. I'm only running stock 7psi but for some reason I can run it to 5-6 psi at probably 60% throttle with no problems but as soon as I go near WOT, it goes very hesitant with a rapid backfiring and jumping boost reading between 3 and 15ish pounds. replaced coolant temp sensor and plugs are new. another slight problem I'm having is as soon as I hit operating temperature (3rd notch on gauge) it stumbles a couple times and then picks back up which leads me to believe o2 sensor is a possibility. Vacuum is at a steady 20inhg at idle btw. Going to give the o2 a try but if thats not it, im at a loss. Please give any insight if any of you have had this happen to you. Any help is appreciated. Thanks.


Also.. I've tested my TPS and its throwing correct voltage closed and open.