losing boost at wot

[97koukile]

ok guys i giong crazy here with my car. first off i have a 97 240sx with a zenki s14 sr20det swap in there for a year now. now i am running 15psi and one day i was giving my friend a ride and i felt something pop. i did a boost leak test and set it at 20psi. during that test i found the middle intake gasket was leaking so i change it while i was there i change a coolant temperture sensor and theromstat. put everything back and make sure the tps was right it wasnt so i set it at .45v. but when i tighten it, it goes back down to .41v it all the way down(towards the bumper). so i went for a ride anyway and its good until 5k rpm and then boost dies but still revs somewhat it goes 13-14psi and then to 8 psi. but at half throttle i see 10psi all the way to 6k rpm. i have a aem wideband and it at 13.4 -13.9 when i get off the gas it suppose to be --- when i get off the gas. now at idle its at 13.0 really rich. is my turbo no good. also had new parts install ivac, bkr6eix plugs, fpr is set at 48psi, new hks wastegate accurator,all the intercooler clamps have t bolts and tighten all the way tight.

[1KleenS13]

Do you have all your vacuum lines on? I doubt your tps being off by that little will effect WOT operation, but I would see if you can get it set correctly first. Also a fat tune can hurt spool-up.

[sil80]

double check the spring in the BOV and test the wastegate actuator. I have had this problem before and found a broken secondary spring in my BOV. also after replacing that somehow I cracked a bad weld in one of the intercooler pipes.

Are you burning alot of oil?