well, this is probably going to be kinda long, so get comfy. first, it's a 91 tsi 5 sp, 14b @15 psi, fmic, 550's, 255 pump, afpr, logger, afc, all other supporting mods.

i blew my b16g a couple of weeks ago, and replaced it with a used 14b in good condition. the car has been running great since friday when me and my friend did the swap, but today while driving i tried to boost, and it hesitated at about 4500 rpm, then boosted fine. it got gradually worse, and now under full throttle it wont go past 4500 rpm, just stutters badly. as far as i can tell all the logger readings are normal.

at the same time, i noticed the air temp reading on the logger was at 81.2 degrees. it usually stays at 80.4 degrees unless i'm in stop and go heavy ass traffic. when it goes to 81.2 degrees, it kicks the rpms up, like after a while it will idle at 2300. this has been happening since i got the car 6 months ago, and it was never really a bad problem until today. usually when the temp goes up like that, i'll drive normally for about 6 blocks and the temp will go down at idle. now it won't. it stays at 81.2.

any help is greatly appreciated.