ok so now i have a problem with my car falling on it's face at different rpms. it all started when i changed the spark plugs out and added a lil' boost and now it holds 21 psi no higher. it only happens during wot, it just stops for a split second and you can hear a loud pop when it falls on it's face. but then i picks right back up. when it pops the afr's are at 10.4 (yeh i know it's rich) its happend at 4k 6xxxk and a few other random spots any help would be greatly appreciated.

 

Sounds like fuel cut. Turn down the boost a little and see how it acts.

 

tried, i bottomed out the controller and it was only pushing like 19 or 20psi.

 

The stock boost limit table is fairly low (in terms of load %) and tapers down fairly drastically in the area you're referring to. I'm almost certain that is your issue. Your solutions are:

1) Get a tune
2) Find a way to further lower boost

 

close thread plz. it was the spark plugs the tips were actually had a krazy mold or dust cover on them so the plug was never fully in contact with the wire.

 

Great to hear! Fixes like that are always the best ones!

 

Glad you found the issue ...