Throttle Body for 1988 300CE - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 10-12-2011, 07:06 PM Thread Starter
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Throttle Body for 1988 300CE

I believe the throttle body in my 300CE is about to go out, if it hasn't already, because the car has been idling really high lately. Anyway, I was wondering would a throttle body from a 300D (Diesel) work as a good replacement? Also, I have yet to try some injector cleaner. Does anyone think this would be worth a try, especially before I go out and get a new throttle body?
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post #2 of 2 (permalink) Old 10-13-2011, 05:23 AM
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I rather doubt that your high idle condition is caused by a bad throttle body, not least because these cars don't have a throttle body in the sense that you mean, rather, the throttle plate is in the intake plenum assembly and pretty much doesn't fail. That's not to say you shouldn't clean it thoroughly every once in a while. The diesels use a completely different intake, so no, that won't help you either. I would say it's more likely your idle control valve is stuck wide open, either due to failure or to grime.

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