C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

warm start issues....

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Old Jan 20, 2014 | 05:47 PM
  #1  
RWDlifer's Avatar
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From: Carolinas
2005 C230K SS
warm start issues....

Reading up on crank/start threads it seems that most people have issues with cold starts. I happen to have the opposite; cold starts are no problem and idle is solid even in frigid temps. Warm starts are the problem. The car cranks strong but kinda stumbles through the start process with bogged idle and shaking, and then recovers and idles normal. This happens most frequently after a stop/start of about 10 minutes. When the car sits for longer the starts are fine. Fuel filter, plugs are recently replaced, throttle body cleaned, no CELs, new alternator. Engine harness was replaced by dealer a couple of months ago under warranty along with the O2 sensors. Other than that, car runs great and pulls strong, great mpg.
What could it be? I'll try post a vid, meanwhile ideas please....
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Old Jan 20, 2014 | 06:17 PM
  #2  
Glyn M Ruck's Avatar
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From: Llandudno, Cape Town, South Africa
late 2009 CLK 350 Coupe Elegance, '65 Jaguar S Type wires
Hot start problems could be that you are heading for CPS failure. Next time it does this pour cold water over the CPS & try again.
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Old Jan 20, 2014 | 06:46 PM
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RWDlifer's Avatar
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From: Carolinas
2005 C230K SS
Been doing more reading since I posted, seems like a CPS issue. They are cheap so I'm gonna do this next couple of days and see if it helps..
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