so i have a 06
2.9
60's
zzp 1.0 pcm
zzp midlength header/dp
shitty exhaust.
zzp cai

so after the exhaust got done i took her out to play around. well like 4 hours later i get on it in second pulled just fine to 7k shifted into 3rd and not even a second later ding ding reduced power mode. so i pulled over its sputtered and eventually died. start it back up i try revving it up.... the rpms went up soooo slow. threw code for p0121 and misfire on #1... ok. so i clean the maf and the tb. unpluged maf while car was acting up it dies, no dice, tried new tb, no dice. regapped plugs no dice. changed back to stock pedal from gmpp no change. the car runs fine unless i stay in boost long. but, i can clear the code while its running and the car runs fine. but now it will go into reduced power mode without any codes. things im going to check next:

fuel filter
wiring
cat?

ive used the search feature it hasnt been helpful. so if you know of something helpful post it if not dont waste either one of ours time.