Question about 1998 Toyota Celica
Cant accelerate hard without cutting fuel supply
The turbo never "engages". The turbo spins all the time, but the amount of exhaust gas driving it is adjusted by the wastegate.
The problem you are experiencing could be due to the wastegate's vacuum tube being disconnected. The wastegate is meant to open as the inlet manifold pressure increases, so that the turbo spins less and doesn't compress the air too much. It could also be the result of a faulty sensor, but check the vacuum tubes first. Your wastegate actuator is fitted just behind the turbo. If the pipe has come off recently, you should be able to see a clean section where it's meant to be joined to the actuator. The disconnected pipe should be fairly close by. Again, the pipe should be connected to the inlet manifold though from memory I think this is one of the difficult to reach pipes on the back of the engine.
As a side note, the turbo guage on the dashboard is very poor. Even if only for the sake of diagnostics, you should get a cheap direct vacuum driven guage.
Posted on May 17, 2009
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Posted on Jan 02, 2017
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