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Intermittent excessive noise and vibration at idle
So, I've had just general maintenance and some small minor problems since I bought by B4. The greatest of the problems to date is a tooth finally breaking loose in my driver side window regulator. However, the greatest annoyance I have is excessive noise and vibration when coming to a stop.
It is a bit hard to describe in all honesty. It is mostly noticeable in the cabin. Weather I down shift to help slow down to a stop, use just the brakes, or if on an incline I coast to a stop in or out of gear, I get this problem. So when the car come to a stop, the engine come back down to idle. It pauses for a few seconds at idle and then becomes quieter and engine vibration mitigates as well.
Here is the catch, it stopped "calming" down like this beginning about a year and a half ago. I just stays at the louder and harsher idle. I can sometimes force the engine to become quieter by going into first and letting out the clutch just enough to start catching and this will sometime cause the engine to then calm down. I can also turn on the AC for a few seconds to do the same. I've had my VAG hooked up looking at IQ, MAF flow rate, and RPMs and there is no difference in any of the measurements between these two states.
Lately, I'm noticing outside ambient air temps have an impact on this. A warm day (above 75) will have this occur only 20-30% of the time whereas a cool (below 70) it will happen about 85-95% of the time. kooyajerms and Fixmy59bug have both looked at my engine when warm and there doesn't seem to be enough play on my engine mounts during idle or even starting it. I'm at ~122K miles and about ~18K away from a timing belt change that would be 4K early. I do have a tensioner or the harmonic balancer that oscillates with a range of about 1/3" off of center, but checking it between both states of the engine show do difference in how much it moves.
Any help is greatly appreciated.
So, I've had just general maintenance and some small minor problems since I bought by B4. The greatest of the problems to date is a tooth finally breaking loose in my driver side window regulator. However, the greatest annoyance I have is excessive noise and vibration when coming to a stop.
It is a bit hard to describe in all honesty. It is mostly noticeable in the cabin. Weather I down shift to help slow down to a stop, use just the brakes, or if on an incline I coast to a stop in or out of gear, I get this problem. So when the car come to a stop, the engine come back down to idle. It pauses for a few seconds at idle and then becomes quieter and engine vibration mitigates as well.
Here is the catch, it stopped "calming" down like this beginning about a year and a half ago. I just stays at the louder and harsher idle. I can sometimes force the engine to become quieter by going into first and letting out the clutch just enough to start catching and this will sometime cause the engine to then calm down. I can also turn on the AC for a few seconds to do the same. I've had my VAG hooked up looking at IQ, MAF flow rate, and RPMs and there is no difference in any of the measurements between these two states.
Lately, I'm noticing outside ambient air temps have an impact on this. A warm day (above 75) will have this occur only 20-30% of the time whereas a cool (below 70) it will happen about 85-95% of the time. kooyajerms and Fixmy59bug have both looked at my engine when warm and there doesn't seem to be enough play on my engine mounts during idle or even starting it. I'm at ~122K miles and about ~18K away from a timing belt change that would be 4K early. I do have a tensioner or the harmonic balancer that oscillates with a range of about 1/3" off of center, but checking it between both states of the engine show do difference in how much it moves.
Any help is greatly appreciated.
