C32 AMG, C55 AMG (W203) 2001 - 2007

RPM Idle after Gaskets change and Spark plugs.

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Old Oct 30, 2010 | 12:22 AM
  #1  
kjtwow1's Avatar
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C32
RPM Idle after Gaskets change and Spark plugs.

Hello, guys!
I just changed my spark plugs and gaskets today.
After I drove car to home from the shop.
I put my shift on P and RPM idle was not stable.
It was kept moving between 1000 and 1200.
My friend suggested me it might be misfiring.
Need your help guys.
Thank you!
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Old Oct 30, 2010 | 12:32 AM
  #2  
ohlord's Avatar
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
which

gaskets?
any cel?
idle should be about half of what you indicated
look for vacuum leak or if you removed the intake tubes to get at the plugs
check that it is seated fully and no intake leaks.
misfires you would have a check engine light and p0300 range misfire codes.
really looks like a leak though
also check that you did not knock off any vacuum lines
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Old Oct 30, 2010 | 03:28 AM
  #3  
TemjinX2's Avatar
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From: Corona, CA
03 g35 coupe...........02 c32 Sold
i say vacuum leak or loose map sensor.
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Old Nov 4, 2010 | 12:16 AM
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07 E63, 04 discovery
a comon problem i have seen on the 55s may be the same here. there is a metal tube that runs into the back of the intake. the tube is connected by a bolt at the back of the drivers valve cover. If this pipe is on the 32s also it can slip out while performing repairs. try to wiggle the pipe it should not move freely
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Old Nov 4, 2010 | 12:55 AM
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2005 Pontiac GTO 6.0 LS2 - Blue
The rear metal tube on my c32 slipped out and caused unstable idle but it was dying out not increased RPM. I have an issue where the vehicle will sometimes accelerate without gas applied, and will rev up in neutral/park. Doesn't happen often. Researching I found something about sensor on gas peddle. Is a somewhat common problem from what I remember.
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Old Nov 4, 2010 | 11:30 AM
  #6  
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07 E63, 04 discovery
Originally Posted by gt4awd
The rear metal tube on my c32 slipped out and caused unstable idle but it was dying out not increased RPM. I have an issue where the vehicle will sometimes accelerate without gas applied, and will rev up in neutral/park. Doesn't happen often. Researching I found something about sensor on gas peddle. Is a somewhat common problem from what I remember.
I had this exact problem on an E55. On this vehicle is was the metal tube. the only thing that alerted me of it is when i blipped the throttle in nuetral the rpms stayed at 2000. Scanned it and it threw throttle actuator codes.
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