turbo wont boost

john_lauj · 11-23-2010, 12:52 AM

i have a 89 supra turbo and i can boost more than 8 psi. i chime the waste gate to gain my boost. i was at 3 washers and i was getting 8 psi. i went to 4 washers and i still get the same result. is it possible that i have a leak?? if so any idea which hose it can be???

Minymurf · 11-23-2010, 04:28 AM

do you have a boost contoller on it?

john_lauj · 11-23-2010, 07:38 PM

no. i chime the waste gate to gain boost.

btwilson86 · 11-23-2010, 08:10 PM

There's definitely the possibility of a boost leak, unfortunately ANY hose can be a suspect hose. Just idle the car and listen around the engine bay, if you hear any air being sucked in besides at the air filter, there's a vacuum/boost leak.

You should really do away with the wastegate shims. Although it's easy and cheap, you put more stress on your wastegate. You can build a MBC easily (and more importantly, cheaply). That way you can adjust your boost as needed without unnecessarily adding more stress to other components.

11-23-2010, 12:52 AM	#1
john_lauj Stock Join Date: Mar 2010 Location: frresno Posts: 20	turbo wont boost i have a 89 supra turbo and i can boost more than 8 psi. i chime the waste gate to gain my boost. i was at 3 washers and i was getting 8 psi. i went to 4 washers and i still get the same result. is it possible that i have a leak?? if so any idea which hose it can be???

11-23-2010, 04:28 AM	#2
Minymurf Intake Join Date: Sep 2010 Location: Australia Posts: 30	do you have a boost contoller on it? __________________

11-23-2010, 08:10 PM	#4
btwilson86 Super Moderator Join Date: May 2007 Location: Billings, Montana Posts: 1,034	There's definitely the possibility of a boost leak, unfortunately ANY hose can be a suspect hose. Just idle the car and listen around the engine bay, if you hear any air being sucked in besides at the air filter, there's a vacuum/boost leak. You should really do away with the wastegate shims. Although it's easy and cheap, you put more stress on your wastegate. You can build a MBC easily (and more importantly, cheaply). That way you can adjust your boost as needed without unnecessarily adding more stress to other components. __________________ 1989 7MGTE R154 Targa Top White Package w/Blue Interior Driftmotion 57trim CT26, Upgraded Intercooler, 2.25" Hard Pipes, 3" Turbo Back Exhaust with Test Pipe, HKS VPC w/GM 3 bar MAP sensor, APEXi S-AFC, Walbro 255lph fuel pump, ProSport EVO Series Boost / Fuel Pressure / AFR gauges, Lotek a Pillar Gauge Pod, HKS Type 0 Turbo Timer, Eibach Lowering Springs, Tokico Illumina II TEMS struts, custom powder coated Motegi Racing TrakLite wheels

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11-23-2010, 07:38 PM	#3
john_lauj Stock Join Date: Mar 2010 Location: frresno Posts: 20	no. i chime the waste gate to gain boost.