Depends on where the problem is. If the problem is the wastegate acutuator (gold or rusty cylinder attached to the turbo), replace it. If the problem is the wastegate flapper assembly (arm attached to turbine housing on the turbo), pentrating oil works wonders. If that does not work, you have to replace the turbine housing.
Faulty waste gate, improperly sized turbine housing.
The waste gate controls the boost coming out of a turbo by bleeding off exhaust gases/pressure to the turbo's turbine. By control the amount of gases/pressure the turbine see's, it controls the turbo's speed/pressure.
a turbo charger unlike a super charger sucks in air releasing pressure ie in the form of a waste gate. unlike a super charger a turbo does not use horse power to generate horse power. differences from gas to diesel doesnt change
Please clarify your question and include make, model, year, engine size and transmission. Are you asking about an actuator for the turbo charger? The waste gate on the turbo charger? Or for the heater vent controls?
yes some turbos come with out a waste gate (none waste gated turbo)
A waste gate is found in turbocharged engines; it basically spits out excess air from turbo, lessening stress on exhaust components...
It's right there mounted to the turbo itself....
this sounds alot like a turbo failure, although there could well be a leak in the pipes leading from the turbo to the intercooler, or from the intercooler to the inlet manifold. also check the intercooler for leaks. or it is the vacuum pipe that operates the waste gate on the turbo, or a seized waste gate.
on the side of the air filter housing
A waste gate regulates the amount of exhaust gas that spins the internal turbine of a turbocharger based on a predetermined amount of pressure in the system to keep the turbo from continually building boost that is higher than the system can handle. When closed it allows the exhaust to pass over the turbine creating pressure on the cold side of the turbo. With the waste gate open it allows the gas to bypass the turbine stopping pressure buildup.
Either the turbo/turbine housing is too large, the waste gate is stuck open, or the turbine fins are damaged.
toyota estima/lucia have a common fault with the waste-gate actuator playing up.