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Acura TL 06 Rough Idle Problem

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jcasti1226jcasti1226
Participant

    I have an Acura TL 2006 Nav, with 3.2L V6 Engine , it has 43k miles on it and all services done on time, it’s still under warrantee, it has been driven carefully, used premium fuel from Mobil all the time and has had one driver.

    Lately I’m feeling engine vibrations at idle to the point where you feel it on the steering wheel and head rest and every 10 to 20 seconds to what it seems as misfire and no check engine light. Al though the engine maintains a good constant idle speed of aprox. 650 rpm without load.

    This car has had the same spark plugs since I got it(new), so I decided to replace them for the same ones ( Band and Model). I notice on Cylinder 4 liquid oil on the spark plug treads and a black crusty gunk on the bottom of the spark plug of cylinder 5, the rest of them came out clean with normal wear and tear. With the new spark plugs the car acceleration improved significantly but still the rough idle remained and the misfire every 10 to 20 seconds.

    After I week I decided to take the car to Acura and explain my findings and complain about rough idle.

    This were the actions taken by Acura:

    • Check Engine Mounts
    • Computer Diagnostics on the engine.
    • Look at the old spark plugs, check the new ones and ignition coils plugs.
    • Fuel Rail Cleaning (justice brothers emission system cleaner)
    • Engine Idle Reset and Relearn.

    Acura couldn’t find anything wrong with the engine and told me the rough idle, oil on the spark plug treads, and the black crusty gunk on the spark plug on cylinder 5 is at acceptable Acura Limit. I wasn’t ‘t satisfied and decided to take the car to a second Acura service center and ended up with the same results.

    I know by hard there’s has to be something wrong, I have compared many Honda V6 cars with the J series engine including a friend’s Honda Accord 2004 with 142k miles and it’s so smooth at idle you don’t think it’s the engine is on.

    I would appreciate if any one can shed some light on this.

    Regards,
    Juan

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