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i raced a truck a truck a few months ago with my t1and t2 swaped and the same on the leading ever sence ive had problems with my car.Around 3000 rpm with boost it studders. Ive swaped ecus and coilswith little differance.the car will drive perfect unless you get into it.what did i mess up?mods as so big gready fmic, 60-1 upgrade,720's, s-afc,supra fuel pump,boost controler 12psi,3"exhaust(from turbo to muff.88 turbo II

ttt

The leading ignitors fire at the same time, so it doesn't matter if your leading plugs are swapped around. The trailing plugs can not be swapped. Did you have the same mods at the time you swapped the plugs back to where they belong?

no the 60-1 upgrade was just made.but the problems were before