Hi, ive got an 88 supra with a 7mgte auto trans, ive been having weird boost issues for a while now. When i step into the boost the gauge (aftermarket) will fluuter some and boost does fine between 1-6psi but once i go wide open, will boost hard then hit 8psi with gauge flutter, then will go down to 4psi at higher rpm and wil cut out once before shifting over in pwr or norm mode. then do the same over again.
Mods are
DM fmic and 2.5 hardpipes
DM egr blockoff plates
3'' downpipe/catless straighpipe exhaust
k&n cone filter.
Wastegate is stock, i have made sure all intercooler clamps are tight as they can be, i rebuilt the top end about 1k ago with new head arp bolts new cx racing turbo (stock spec). i didnt have this issue before with only fmic and stock dp and exhaust. it would hit 6-6.5 psi with mild gauge flutter and not cut out. idle is fine, drives smooth otherwise. no overheating. didnt have codes at first but now i have a code 34 turbo pressure abnormal. i have read tons of boost leak threads alike and havent found an answer. insight or help on this would be awesome. not being able boost full on sucks especially with an auto.
Mods are
DM fmic and 2.5 hardpipes
DM egr blockoff plates
3'' downpipe/catless straighpipe exhaust
k&n cone filter.
Wastegate is stock, i have made sure all intercooler clamps are tight as they can be, i rebuilt the top end about 1k ago with new head arp bolts new cx racing turbo (stock spec). i didnt have this issue before with only fmic and stock dp and exhaust. it would hit 6-6.5 psi with mild gauge flutter and not cut out. idle is fine, drives smooth otherwise. no overheating. didnt have codes at first but now i have a code 34 turbo pressure abnormal. i have read tons of boost leak threads alike and havent found an answer. insight or help on this would be awesome. not being able boost full on sucks especially with an auto.
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