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My vechile is an 82 380SL (euro). I have a similar intermittent rough cold start with low rpm and surging that resolves as the engine warms up. Once warm idling is smooth, but there is a slight hesitation with rpm drop when pressing the pedal lightly. Previously replaced warm up regulator, this decreased the loping idle. Disconnecting the electrical plug from the airsleeve boosts RPM to 1500 correctly. Stevebl posted a vacuum line diagram for the 560SL. Does anyone have a similar diagram for my car or the US equivalent that I may use for further troubleshooting. Any other suggestions to check on.
JRJ
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82 380SL euro (sold)
93 400E (sold)
99 BMW 328IC (Wife)
2001 GMC Yukon XL
2001 Honda Accord (son #1)
2005 Mazda 6 (son #2)
2006 Honda civic (daughter)
"Always too many cars in the driveway"
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