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CLK-Class (W209) 2003 on: CLK 270 CDI, CLK 200K, CLK 200 CGI, CLK 240, CLK 320, CLK 350, CLK 500, CLK 550 [Coupes & Cabriolets]

car hesitates stutters on acceleration

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Old Mar 8, 2016 | 10:28 PM
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irokdastar's Avatar
irokdastar
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From: NYC
2004 CLK 500
car hesitates stutters on acceleration
So i just started noticing this since i did my exhaust and i kind of felt it before i did the exhaust but now i can definitely hear it . if i am on a stop light and i am about to go , I press the gas it starts to pick up dies off for a second and picks right back up . and with my exhaust i can hear the difference . Also the car seems like to hang in the gear . anyone experienced this ? can it be vacuum leak or is this common ?
Last edited by irokdastar; Mar 8, 2016 at 10:31 PM.
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Old Mar 9, 2016 | 09:46 AM
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2013 CLS63, 2001 ML430, 2012 e350 coupe
can you check if there is any codes or pending codes?
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Old Mar 9, 2016 | 10:50 AM
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irokdastar
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2004 CLK 500
Originally Posted by gixxerboy
can you check if there is any codes or pending codes?
No codes coming up. And no codes stored .
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Old Mar 9, 2016 | 10:55 AM
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2013 CLS63, 2001 ML430, 2012 e350 coupe
sounds like a lean issue from description to me, id check fuel pressure and vacuum leaks
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Old Mar 9, 2016 | 11:13 AM
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irokdastar
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2004 CLK 500
For the vacuum leak . Where should I be looking ? I see a couple of hoses coming our of the valve covets or is there more hoses to check. On my other car I would start the car then take carb cleaner and spray around the engine until I heard the engine speer change . Is it ok to do it with this car ?
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Old Mar 9, 2016 | 11:18 AM
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2013 CLS63, 2001 ML430, 2012 e350 coupe
yes you can do that on this car
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Old Mar 9, 2016 | 10:51 PM
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This could also be a transmission problem, which may not set any ECU codes. I'd get the TCU scanned with equipment that can read it (SDS, iCarsoft, etc.)
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Old Apr 5, 2016 | 11:10 PM
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Sounds like a transmission issue. My dealer fixed mine under warranty as a computer error. I think if I was out of warranty it would have cost about $150.
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Old Apr 6, 2016 | 08:14 PM
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did the dealer tell you what it was ?
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Old Feb 22, 2022 | 11:23 PM
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Same symptoms. Codes all looked good, thought it was a dirty MAF which I cleaned, still no good.

Bottle of injector clean fixed it all up.
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