johnsongti
Member
ok 2001 Alh 280,000 miles. Intake has been replaced once in its life. Turbo is original. I have checked the vac system and N75 valve. I replaced the N75 with a good working one and this is what im finding. If you log with VagCom it says that the % for the N75 should be around 45%-97% or so with the car idling. This car is at 24% at idle. My question is what would cause the N75 to have a lower spec then what its supposed to? Im finding also that the Vane Actuator is not moving at all when I run the VagCom test. I thought it may be the actuator so I replaced with a used one with no change. Im thinking it has something to do with the low % the N75 is putting out. When you run down the road full throttle it will only boost to 1150 mbar when the ecu is requesting 1900 mbar. Another thing I was thinking is stuck turbo vanes, when I remove the actuator rod should the lever on the turbo that moves the vans move completely free or should it have some resistance when pulling on it? This one just flops back and forth so I was thinking the vanes could be stuck part way.
Sorry if its a little hard to follow. I have checked all the normal things and im running out of patience with it. Hoping someone can answer my questions about the turbo vane lever and N75% really so I can continue on with my diag.
Thanks in advance.
Sorry if its a little hard to follow. I have checked all the normal things and im running out of patience with it. Hoping someone can answer my questions about the turbo vane lever and N75% really so I can continue on with my diag.
Thanks in advance.