PeachParts Mercedes-Benz Forum - View Single Post - Should I fix this fast idle or leave it alone?

EricSilver · #3 06-01-2004, 02:53 PM

I’ve been on holiday for the past few days. Thanks for the info.

The airflow potentiometer – is that a mechanical part or electrical? I could not find it on Fast Lane.

I plan to do the micro switch first, since it needs replacement regardless, and since the car’s fast idle behavior is variable – from 1000 to 2200rpm in neutral, and normal after the initial spray-down with carb cleaner. (The linkage itself, after blowing off the surface dirt, is actually very, very dry. But that could cause friction stickiness as well.)

Also because the temperature of the engine appears to be a factor – a hotter engine seems to lower the idle from 2000 to 1500, suggesting the micro switch movement is freer under high heat, and that my earlier comments about the switch being stuck may be valid. I hope so – I love easy repairs.

I will look up the airflow potentiometer threads next and see what’s up with that.