Is there a way to tell what's causing kr? I think I have enough supporting mods to run a 3.6 pulley but can't even run a 3.8 without kr. Kr usually starts at 3000 rpm gets up to 2.5-3* and will drop to nothing then start again at 4700 and will go up to 5* I let off bf it goes up anymore.
I have an 04 gtp 103 plugs gapped at .50, 180 thermostat, fwi, walbro fuel pump, new fuel filter, yt 1.84 rockers, zzp 3" down pipe w/o cat, front plog, and an intense can tune.
Does this sound like a tune issue? Or is there something else I could try to see what's going on?