Help With Strange Vibration/Idle Issue
07-18-2011, 12:51 PM
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2004 C240 4-matic
Help With Strange Vibration/Idle Issue
To start off, yes I have read all of the other wikis related to this issue and none of them cover what my issue is.
2004 C240 98K
Replaced plugs a month ago
Replaced front CV boot last week
The Problem:
Engine vibrates considerably while in drive or reverse but stopped, not at all when moving or Idle. I have never experienced this before, but it started as soon as I replaced the CV boot. RPM's seem to be steady, does not seem like the engine is running rough, just that there is a significant vibration through the vehicle. The RPMS are about 750-800 in idle, and 550-600 in drive, does this seem low, or could it be another issue? I am not throwing any codes, but I suppose I could stop by an Autozone and check for precodes.
Does anyone have any thoughts? I dont hear any vacume leaks and it seems strange that the engine mount would go all of the sudden.
Thanks in advance.
2004 C240 98K
Replaced plugs a month ago
Replaced front CV boot last week
The Problem:
Engine vibrates considerably while in drive or reverse but stopped, not at all when moving or Idle. I have never experienced this before, but it started as soon as I replaced the CV boot. RPM's seem to be steady, does not seem like the engine is running rough, just that there is a significant vibration through the vehicle. The RPMS are about 750-800 in idle, and 550-600 in drive, does this seem low, or could it be another issue? I am not throwing any codes, but I suppose I could stop by an Autozone and check for precodes.
Does anyone have any thoughts? I dont hear any vacume leaks and it seems strange that the engine mount would go all of the sudden.
Thanks in advance.
07-28-2011, 10:02 AM
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2004 C240 4-matic
So I did the mounts, it is about 50% better, but still excessive vibration through the steering wheel and the engine seems to grumble a bit. Any other ideas? I have also had the issue of my CV boots tearing on the passenger side, which I chalked up to an idiot mechanic, or a bad engine mount. But before I have them replaced again I want to rule out any other possible problems. Only vibrates in Drive but stopped, or in Reverse but stopped (not as bad though). Plugs were done, coils are not cracked....I am at a loss.
