i just finished installin a vortech s trim on my 91 mustang gt, well i have a problem??? when i start the car the idle jumps up and down and up and down.. but sometimes it seems like it is gonna idle normal but it doesnt??? and i can't find out why??? there is also a noise comin from the engine every once in a while like a bany noise sort of like it is runnin lean or rich??? any help would be great, with the charger i also installed 38lb injectors with mass air, a mallory fuel pressure regulator... fuel pumps, 70mm throttle body and spacer... what could it be??????????? thanks for the help