When the car is cold it has a rough and low (aprox. 500rpm) idle. It doesn't die or anything, but when I start driving it lacks power and if I am in a higher than normal gear under power (say 4th gear @ 35mph), the acceleration is shuddery. The colder it is outside, the longer it takes to warm up. It may be 15min of stop and go driving at abt. 53 F. before it starts behaving.

If I am under power when it warms up there as a surge of power and then my power is right where it should be. Even when the car is warm and I shut it off and then turn it back on it usually takes about a minute till the idle goes from low to where it should and my power is good under load.

Has anyone experienced anything like this? any ideas? I'm not even sure where to start trouble shooting this one.

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1987 MB 190E 2.3 16V- Name Pending
1982 MB 300SD -Old Blue
1965 Ford Mustang - Laura