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Idles very fast,starts hard
1990 Mercedes-Benz 500SL

Idles very fast,starts hard

(1990 Mercedes-Benz 500SL)
idle control valve?
2 answers & 0 comments
Popular Answer
on May 03, 2011
More likely an unmetered air leak into the engine. Look for loose air intake duct clamps, a tear in the intake ducting, etc. It's possible that the IAC is faulty, but if that were all it is, I'd think the engine would start easy, Unmetered air would cause hard starting.
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https://repairpal.com/mercedes-benz-repair-in-taylor-michigan
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General Diagnosis
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on May 03, 2011
More likely an unmetered air leak into the engine. Look for loose air intake duct clamps, a tear in the intake ducting, etc. It's possible that the IAC is faulty, but if that were all it is, I'd think the engine would start easy, Unmetered air would cause hard starting.
If you want to find a specialist, here's a directory link for you:
https://repairpal.com/mercedes-benz-repair-in-taylor-michigan
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of JP Motors on May 03, 2011
There should be an overload protection relay in the right front engine area by the firewall, check to see if fuse is blown or failed relay, this will affect both of your problems. Jump starting the vehicle with high voltage or crossed cable usually cause this type of problem.
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