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Car acting wierd after Catback, help.

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Old Dec 10, 2009 | 12:12 PM
  #1  
malahhaor's Avatar
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From: ChiTown
06 Carrera4
Car acting wierd after Catback, help.

Hey guys, can someone shed some light on what may be happening?
So I don’t know if it’s a coincidence or a cause.
I recently got an Eismann catback. And not right away but a little time later I’ve noticed my trainy started behaving weird.
When driving smooth and not accelerating quickly it shifts weird, almost as if engine jumps by a hundred RPMs before the up shift. And sometimes it shifts right back to a lower gear.
Also I’ve noticed that if I’m cruising with only light pressure on gas around 35 to 40 miles the RPMs are jumping up and down by 200 or so.
Now, all of that during very casual light driving. When I go a bit aggressive it seems fine.
Any thoughts?

--- o4 CLK500, Green filters and Catback.
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Old Dec 11, 2009 | 09:34 AM
  #2  
Cobraguy's Avatar
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CLK320
sounds like a converter locking and unlocking. If so, that could be from several different causes. You may want to get that looked at asap. That trans is not cheap.
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Old Dec 11, 2009 | 11:38 AM
  #3  
FastDonzi's Avatar
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'10 c63,'03expedition,ducati999,22'Donzi
maybe you have that glycol contamination problem that was an issue on this car.hopefully you don't, but you should look into it.how many miles on your car? do you have a warranty? good luck bro
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Old Dec 13, 2009 | 11:38 AM
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From: San Diego
2005 clk500
glycol contamination problem

For all 2003 and older CLK owners that would be the first thing I would do if I bought it used is replace the radiator and check transmission fluid. It's definitely one of the most exspensive repairs.Why would you wait till somthing happens.
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Old Dec 14, 2009 | 11:17 AM
  #5  
malahhaor's Avatar
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From: ChiTown
06 Carrera4
Originally Posted by slicksterps1
For all 2003 and older CLK owners that would be the first thing I would do if I bought it used is replace the radiator and check transmission fluid. It's definitely one of the most exspensive repairs.Why would you wait till somthing happens.
I never hear of glycol contamination problem, will certainly look in to it now.
The car is approaching 52K, i have an extended warranty but getting them to pay is another matter.
I am almost due for an oil change so i was planning on asking my guys at the deallership how much doing the 50K maintenance is, if it's anything segnificant. otherwise i'll change all of the fluids my self.
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Old Dec 14, 2009 | 06:05 PM
  #6  
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From: Jerzy
04 CLK 320 > CLK32K
Originally Posted by malahhaor
I never hear of glycol contamination problem, will certainly look in to it now.
The car is approaching 52K, i have an extended warranty but getting them to pay is another matter.
I am almost due for an oil change so i was planning on asking my guys at the deallership how much doing the 50K maintenance is, if it's anything segnificant. otherwise i'll change all of the fluids my self.


Good Luck!
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