I have been dealing with vibrations when my MKIV tiptronic Jetta's engine is cold.
The vibrations that I'm experiencing are listed below after a cold start, happens chronically:
- Reverse (Almost always apparent when the engine is cold, but once you are in 1st gear and give it a little gas the vibration goes away)
- Idling (it occasionaly happens in park, and sometimes just goes away as the idle settles down...never happens when engine is warm)
- After Initial "take-off" (goes away and doesn't come back until engine is cold again)
- As might be expected, the problem gets worse in the winter months.
- One time the vibration was so bad the engine just stalled on me & had to turn it back on again (It displayed a check engine light briefly then went away) - This was months ago and hasn't happened since.
I have been told this may be an engine mount problem. If anyone has input on how I can tell if this is true without lifting the engine off & seeing if a mount is worn, I am all ears. I doubt worn engine mounts would make my engine stall out, but It definitely could be part of the problem.
I have recently (after stall problem) been to a shop where:
- Flushed all fluids (brakes, trans, power steering, etc.)
- had the Mass Air Flow sensor MAF cleaned/checked
After the service, I didn't have any problems for a few days, then it started happening again. One other note from the service, my trans fluid was almost black, though at 85K miles I'm not sure it was ever changed.
Thanks for your wise VW knowledge and reading my long post!