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'06 tC Shaking at Idle

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    Hey all, I'm new to the forum and have been having some trouble with my '06 tC. The car shakes pretty bad at idle, has low RPMs and sometimes feels like it is going to die. The second I push the accelerator the shaking goes away. I just put in a new battery and switched the alternator last week but still having the problem. Only mod I have done in a CAI. Please help!
    Replace PCV valve, the part cost less than $10 and if it's never been replaced, will probably fix your rough idle. Trust me, I had the same problem and this little part made my car run smooth again.
    bossprecision wrote:
    Replace PCV valve, the part cost less than $10 and if it's never been replaced, will probably fix your rough idle. Trust me, I had the same problem and this little part made my car run smooth again.


    I tried this and at first it worked great, car didn't shake at all. But now after a few days its back to shaking again. Thoughts?

    have you checked your throttle body plate for deposits? If the pcv valve isn't working well that gunk (pcv routed back into the intake) can build up.. Also.. if that is clean, have you checked your engine mounts? I just had to replace the rear mount after this many years (mines an 06). No more shaking at idle with the a/c engaged.
    I'll check the throttle bottle plate today. Mine is an 06 as well and Ive done 2 of 3 mounts and the transmission mount. But I haven't done the rear one yet. What is the best way to check it?
    jawshark wrote:
    I'll check the throttle bottle plate today. Mine is an 06 as well and Ive done 2 of 3 mounts and the transmission mount. But I haven't done the rear one yet. What is the best way to check it?


    when I checked mine I had it up on jack stands, left front wheel off, had someone in the car, foot on the brake pedal, put the car into drive and watched the rear mount bottom out on the frame of the mount. To replace it I had to remove the front exhaust pipe then was able to get access to it.

    Also.. I did remember this one, clean the MAF sensor (on top of the air cleaner box). CRC sells excellent MAF sensor clear for this. That also was affecting my idle.
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