Need help with a 89 7m-gte
 

Hi all i seriously need help...i just bought a toyota supra 1989 Turbo and i need help...when i hit the thorttle at 1/2 the boost gauge show me like 8.5 psi... when i FOT (full open thorttle) it goes to 10 psi and at like 4500 rpm it goes to 15 psi and i get some misfire or fuel cut this suck....whats the best way to control the boost to max 8 psi?? the waste gate is adjustable?? or mine is just broken?? did i have to buy a boost controller??

i just gone to my last schoo and we plugged a snap-on scanner on it (for the check engine light)....theres 2 code error...... the Knock Sensor and another (53 i think) turbo and air flow problem....

ill've just read some post...i heard about shimmed wastegate... i think mine is because both bolt have 4 shim behind each... maybe thats making me having that 15 psi??? ill tryed to remove 2 of the shim but the bolt is torqued but the wastegate still can move so i shimmed to the other side ( 2 shim to make the wastegate more far from the turbo) ive tryed it and the turbo dont seem to go more then 10 psi...but i cant really test it cuz the clutch is slipping


but adding or removing shims is a way to control the boost?
the car also have a 3? straight pipe (no cat) exhaust and a knN air filter...it also have arp torqued bolts.plz help me i wanna limit the turbo to 10 psi what should i do???

i also have the burned bulb dash light,antilock and check eingine light on

I only have 4 washers and i hit maybe 10lbs of boost, I would just remove a washer or two. Get a boost controller to be safe and a good guage

remove all washers from wastegate
buy a boost controller & a good gauge

don't adjust boost controller till you know what your car does stock

if you hit fuel cut once you start adjusting the boost, turn down the boost

i removed 2 washers so there only 2 left...the boost is now 10 psi but i still get some misfire or bad air/fuel ratio (not sure) i got a faze boost gauge...its a kinda good one...i should left 2 washer and just buy a boost controller and all will be ok?

i bought the car like that (4 washers)

remove "all" washers and have it stock
then troubleshoot the car, if it's fine then install a boost controller (no more washers) and change you boost from there

okay so a manual boost control will be okay like this one..??


http://cgi.ebay.ca/TURBO-BOOST-CONTR...QQcmdZViewItem

what kind of mods do you have such as intake system, I have the same problem

remove "all" washers and have it stock
then troubleshoot the car, if it's fine then install a boost controller (no more washers) and change you boost from there - quote supra_girl (didnt rephrase your post this time, just copyied it)

wow its almost like hes speaking another language or something