thirty second rough idle on first start up of day! - Mercedes-Benz Forum

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post #1 of 4 (permalink) Old 10-18-2011, 03:28 AM Thread Starter
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thirty second rough idle on first start up of day!

I have just bought a 1987 Mercedes 300 e,this car is very clean and in great shape! everything works on this car,the man I bought from told me the first start of the day takes 30 or so seconds to smooth out the idle any suggestions? it is only first start of the day then it runs fine and smooth please help me with this problem anybody
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post #2 of 4 (permalink) Old 10-18-2011, 05:34 AM
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Congrats on the car. Last tuneup was when?

Felicita e un bicchiere di vino con un panino.
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post #3 of 4 (permalink) Old 10-18-2011, 07:15 AM Thread Starter
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my understanding is that a tune up was done recently,doing some digging around here I wondering if I should be looking at the OVP or some other kind of sensor that controls this ? because again this problem only happens when the car is first started for the day and for only like 20-30 seconds but unless you keep your foot on the gas the car will stall
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post #4 of 4 (permalink) Old 10-18-2011, 02:28 PM
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There are instructions in the sticky on the w126 forum to test the OVP. I believe you have a M103 engine. The instructions will work on the OVP on that engine.

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