Throttle body cleaning / Rough idle

[Third Gear]

he probably says that because you have to disconnect more things and then you might have to put on a new throttle body gasket, disconnect coolant lines, vacuum lines, etc._x000D_
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There really isn’t a need to clean drive by wire throttle bodies because there i

Topic

[SuperTechJeff16415]

[quote]Quoted From Third Gear:_x000D_
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There really isn’t a need to clean drive by wire throttle bodies because there isn’t

[benzrider85]

[quote]Quoted From SuperTechJeff16415: _x000D_
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Yes, the computer controls the idle by opening and closing the throttle plate, but if there is carbon build-up on the throttle body walls it can stick or not close as much as it needs to. (Granted, that is

[SuperTechJeff16415]

Sounds like you are on the right track; but when you are replacing the filters, go ahead and pull one of the plugs and see how look. If you see anything strange post on the forums

[EricTheCarGuy]

The reason I say that is because my inbox is full of people that have removed their throttle bodies to clean them only to have problems after they install them back on the engine.

[benzrider85]

Well after driving the car for several days with my new fuel and air filters I haven’t noticed a change._x000D_
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I need to add to the mix two other symptoms:_x000D_
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Negative bank 2 ST fuel trim 15-25% with LT FT negative 1-3% at idle (also intermittent, but does n

[dreamer2355]

I would check a FSM and trouble shooting that P1522 code. Cam sensors are best checked with a scope. If you dont have a scope, at least be check for power and grounds with the aid of a wiring diagram._x000D_
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STFT numbers will fluctuate depending on engine loa

[EricTheCarGuy]

Yea it would have been good to have that information.

[Author]

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