I've been having an issue with my Supra lately and I'm trying to narrow down what the cause could be. I'm seeing fluttering on high boost with stock twins. I rigged up an adjustable wastegate spring to keep tension on the otherwise piss poor rod. It can hit up to 1.5-1.6 bar (21-23psi) with full tension. I have it backed off to hit a peak of 1.4bar. Lately I've noticed under WOT it hits 1.4 then down to 1.3 and then back up until I take my foot off the throttle.
Could this be something with my spring? My plugs are 3330s gapped down to .30, brand new coil packs and brand new ignitor as well. My only other thought would be the boost controller, Profec B Spec II. Any input is appreciated.
Could this be something with my spring? My plugs are 3330s gapped down to .30, brand new coil packs and brand new ignitor as well. My only other thought would be the boost controller, Profec B Spec II. Any input is appreciated.