I have had this issue for a little while, the car vibrates on the inside and can be felt from both passenger and driver.
Also want to note that the vibration is only felt in lower rpms and idle.
Here is what I've fixed so far:
- Coil Pack
- Cleaned MAF
- Replaced plugs AND wires
- Cleaned TB
Just bought my second car tonight, 1991 VW golf gti 8 valve version. Took it for a test drive the other day and it sounded and drove great, engine is super clean and the guy who owned it is a mechanic and has replaced or rebuilt pretty much everything under the hood. Drove it home on the freeway...