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Old 07-16-2003, 01:02 AM
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Join Date: Feb 2003
Location: Niantic,Ct. Attawan
Posts: 143
190E warm start-up revs. all over the place!

Car starts, and idles very smoothly when cold.
When car is warmed up and I start it-it revs between 7 and 15 for about 7-9 times, then smooths out. A little sooner if I race engine.
Any ideas?
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Old 07-16-2003, 10:11 AM
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Join Date: Jul 2001
Location: SoCal
Posts: 1,303
Could be the airflow meter potentiometer is starting to wear out, or the rotary idle air valve is gummy. Since you don't mention any problems with idle after initial start, there are probably no serious vacuum leaks.

'91 MB 190E 2.3
'08 RAV4 Ltd 3.5
'83 Lazy Daze m'home 5.7
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Old 07-16-2003, 10:54 PM
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Join Date: Feb 2003
Location: Niantic,Ct. Attawan
Posts: 143
Thanks Steve, appreciate reply.
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Old 07-16-2003, 11:31 PM
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Join Date: Apr 2003
Location: Miami,FL
Posts: 807
If your car has an idle control valve, remove the valve, get some "carb cleaner" and spray it out. It might make the world of a difference.
1987 mercedes 300E
1995 e320 conversion(hated the 300e grill)
HID/Xenon (D2S)
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Monochromatic Paint (Custom Blue)
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Sold! Now I drive a Monte Carlo SS

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