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1

How is the turbo pressure regulated in these cars? If there is a linkage that actuates the wastegate maybe it needs adjustment.


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Addition to dlu's answer. Look for restrictions in the intake and exhaust. You can try bypassing the intercooler. For the exhaust, you can temporarily set up an open pipe out of the turbo. either way, something is restricting the turbo from keeping up.


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My first thought, based on the boost dropping as you rev the engine before the turbo was replaced is that there is an inlet restriction. Something like a dirty air filter or damaged inlet piping. That could also cause the replacement turbo to fail to deliver full boost. One quick check for this would be to remove the compressor inlet pipe from the ...


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You can rev it up and see if the vane boosts it to 100% at any moment. If not, it's a ECU not allowing to reach the pressure. So the issue is somewhere before your turbo, like detonation, pre-ignition... If it doesn't open a boost fully, you should see your Lambda sensor readings. Do you have knock sensors? Is the smoke white or black? If the smoke ...


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Some thoughts on how to verify if you have... an intake obstruction Disconnect the air filter (keep the MAF in place) to expose the compressor inlet and log boost values with the car at idle and under load. If the boost numbers are close to what the engine computer is expecting then this would confirm that something upstream the MAF is obstructing the ...



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