now i can rev the car up better runs good but when i give it WOT it studders for a quick second and then takes of even every time i shift car revs up great but any time i go WOT it just studers for a second then takes of also backfires really quick

 

when i first start the car i can give it full throttle then it will rev up this is only happening when its warm again its only a couple of seconds then it builds boost