turbo problems

[Sharpe88]

88 supra with a 3L seems like the turbo is losing pressure, spark plugs fine, doesnt seems to be losing oil, any ideas??? and does anybody know the wastegate specs

[bgrieger]

should be about 6psi pressure. Check hoses amd clamps first if you see less or suspect a leak.

[Maximuscr31]

It always helps to pressurize the intake system starting at the turbo inlet. If there is a leak it will be well known. do it with the car off and have someone watch your boost guage. If pressure drops fast or doesn't build you got a leak, if it hold solid and takes 45 seconds or more to fall back down to 0 then your good. Sounds like a possible boost leak though. Remember not all leaks are visible or occur at low psi.

[Sharpe88]

thanks for your help dude