car chokes at full throttle

[djmixerx]

i went to the track and i was boosting 1.2 bars. i was racing with the throttle all the way open and it choked in every gear. it feels like a kick. it does it once or twice in each gear. now i turn the boost controller to .8 bars and it still does it when i open the throttle all the way.

i think i have a vacuum leak that may be causing the problem. when i bost it sound like supercharge. its a loud whistle it doesnt sound like a turbo. it also causing a idle surge. its going like 600-1300rpm. i test all the lines and it doesnt do anything to the idle surge. i pretty sure its not the TPS, ISC, or the BISS. i have no idea where the whistle coming from i only can hear it when i boost. so i cant look under the hood to find out where the sound coming from

 

[NICKYTALON]

sounds like an ignition problem check your spark plugs make sure the gap is correct .28, also check the wires make sure they have a good connection at the coil

 

[TechT]

I have a very similar problem,but without the ldle surge though...I'm pressure testing my system this weekend just to be sure that there isn't any leaks.