Need help with a 89 7m-gte

flnbobpogoman · 04-10-2006, 12:50 AM

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??

flnbobpogoman · 04-10-2006, 12:59 AM

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....

flnbobpogoman · 04-10-2006, 01:42 AM

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

1988gte · 04-10-2006, 03:00 AM

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

suprra_girl · 04-10-2006, 11:32 AM

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

flnbobpogoman · 04-10-2006, 09:24 PM

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)

suprra_girl · 04-10-2006, 09:27 PM

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

flnbobpogoman · 04-10-2006, 09:30 PM

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

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

gomezmk · 10-08-2006, 06:25 AM

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

j3pz · 10-08-2006, 08:25 AM

Quote:

Originally Posted by suprra_girl

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

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

04-10-2006, 12:50 AM	#1
flnbobpogoman Stock Join Date: Apr 2006 Location: Montreal Posts: 8	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??

04-10-2006, 12:59 AM	#2
flnbobpogoman Stock Join Date: Apr 2006 Location: Montreal Posts: 8	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.... __________________ John

04-10-2006, 01:42 AM	#3
flnbobpogoman Stock Join Date: Apr 2006 Location: Montreal Posts: 8	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 __________________ John

04-10-2006, 11:32 AM	#5
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	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 __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

04-10-2006, 09:24 PM	#6
flnbobpogoman Stock Join Date: Apr 2006 Location: Montreal Posts: 8	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) __________________ John

04-10-2006, 03:00 AM	#4
1988gte 3" Exhaust Join Date: Jul 2005 Location: Lubbock Texas Posts: 140	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

04-10-2006, 09:27 PM	#7
suprra_girl 7M POWAH! ;) Join Date: Jun 2004 Location: New Zealand Posts: 2,312	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 __________________ Please use the forum to ask your questions as they will get replied to much faster than pming me Pics of my build. "Good girls are just bad girls that don't get caught" Do a diagnostic first!

04-10-2006, 09:30 PM	#8
flnbobpogoman Stock Join Date: Apr 2006 Location: Montreal Posts: 8	okay so a manual boost control will be okay like this one..?? http://cgi.ebay.ca/TURBO-BOOST-CONTR...QQcmdZViewItem __________________ John

10-08-2006, 06:25 AM	#9
gomezmk 3" Exhaust Join Date: Jul 2006 Location: Santa Rosa, CA Posts: 70	what kind of mods do you have such as intake system, I have the same problem