hey guys, i have a problem.. i dunno what it is, i dont kno if any1 can help me, but here it goes.
R32 Skyline
Rb20det
R33 Turbo
aftermarket fuel pump
fmic
stock Bov
3" Straight Pipe exhaust, Decat, no resonator, no muffler
remapped to run .9bar
No boost control.
Recently, Boost dropped to .7bar
I changed the Fmic cos my old one was damaged, No difference
CLeaned AFM (was oily) No difference
Cleaned and tightened intercooler piping, No difference
Changed all turbo vac lines, No difference
CHecked turbo for shaft play, it is perfectly fine
Out of curiosity, we put on a Turbosmart Boost T, the setting is 0, as in, the valve is completely closed.
The car HIT .9Bar and held it. BUT-
If i hit full boost (.9) in 2nd gear, and say, shift into third gear @ 7000 rpm, the boost level drops dramatically and takes time to re spool up...
before the response was pretty much instant, so something is still not right.
ANY ideas?
Im thinking along the lines of the wastegate actuator diaphram being faulty?
or maybe a turbo exhaust gasket leak?
any otehr ideas?
thanks guys-