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#1
01-23-2013, 02:16 PM
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Normal idle speed 300E
Looked in the manual and used search, no solid numbers
What is the idle speed with engine warm in N and D of a normal 300E? I am getting less than 600 in D and 700 in N. The car is still lumpy at idle and smells rich in mixture. Motor mounts were replaced in the last year, but the smell and speed seems to be a little low. Thanks. 
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#2
01-23-2013, 07:01 PM
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My 300e has always been 600 rpm in drive, and about 800 rpm in neutral, when fully warmed up.
Oxygen sensor? Idle control valve?
__________________
Streetside: 1987 Mercedes 300E Petrol Blue/Green 2014 Ford Mustang Grabber Blue 1999 Ford Ranger Green Dockside: 1968 Eltro 17 1985 Silverton 34C
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#5
01-23-2013, 08:57 PM
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When it's running, try unplugging the idle control valve. You should notice a big drop in rpm, almost to the point of stalling, say 400 rpm. If you notice little or no difference when you unplug it, you'll have found all or at least some of your problem.
__________________
Streetside: 1987 Mercedes 300E Petrol Blue/Green 2014 Ford Mustang Grabber Blue 1999 Ford Ranger Green Dockside: 1968 Eltro 17 1985 Silverton 34C
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