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OK ON MY 92 GMC TYPHOON I HAVE A 20G TURBO FULLY BUILT WITH A MANUEL BOOST CONTROLLER WITH A 12 LB SPRING IN IT WHEN I LAUNCH THE CAR WITH THE BOOST CONTOLLER TURNED ALL THE WAY DOWN IT JUMPS TO 15LB OF BOOST THEN ONCE IT SHIFTYS INTO 4TH IT DROPS DOWN TO LIKE 5 AND THEN FALLS ON ITS FACE ANY...

Ok I have a 92 typhoon with a 20g turbo 80lb injectors 520 fuel pump all the supporting mods with a turbotweak chip. It idles great drives pretty good going down the road but under 3/4 to wot it is acting like it is getting fuel cut or something along those lines it bucks and will not just do a...