Cold start sudden high rpm (jumped up to 2200)

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golden1245

Active Member
Joined
Sep 6, 2011
Messages
211
Car
1999 C230K Sport
Hey guys, I started my c230k this morning and the rpms shot up to 2200 for about 1 second, and then back to 1200 to warm up and the back to normal idle. Initial start up was louder than usual but there was no shaking, idle hunting or misfire.

It wasn't even that cold, only 15 degrees Celsius. Usually it'll only go up to at most 1500. All starts after that were normal. Any ideas what might be causing this? Temp sensor or something with the throttle?

Thank you in advance for reading.
 

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