Throttle Body Cleaning Problem (190e) - Mercedes-Benz Forum

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post #1 of 2 (permalink) Old 01-24-2007, 09:03 AM Thread Starter
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Throttle Body Cleaning Problem (190e)

I recently cleaned the throttle body (for the first time) of my 190e as a routine- car has no problem at all. But when I drove the car for a spin, the idle went nuts.
At Drive, it is at 1500 rpm. At Park, it is between 2000-3000 rpm. It is sticking.
Once in a while, the rpm goes back to normal at 850. But most of the time, its high and erratic. I have gone to 2 shops already and all checks were good.
But they are still clueless and will not work on it.
Please let me know if you have encountered this problem before. I need your solution fast. Thanks.
NOTE:When I applied the throttle body cleaner, the engine was off per instruction in the can. I only applied about 1/4 of the can because the TB was not that dirty. I did not unplug any hoses when I cleaned it.
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post #2 of 2 (permalink) Old 01-27-2007, 05:26 PM Thread Starter
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Throttle Body Cleaning issue- RESOLVED

It was not the cleaner after all.
The cleaner cleaned a worn out, sticky rusting return spring in the TB.
It loosened and stretched which somehow affected the TB plate action.
We replaced the return spring and now good to go!
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