QZone
Active member
I must confess to being a TDI neophyte, having never owned a diesel. I am looking at purchasing a 2005 Passat TDI, and test drove three cars over the last three days. Hopefully the experienced members of this forum can answer a question that came out of the test drives.
All three cars have around 100,000 kms and appear well maintained. Two of them drove well, with a nicely subdued diesel mutter at highway speed. The third car had a distinct engine vibration at all speeds that could be felt through teh seat, throttle pedal, and steering wheel. At 90 kph the car would run quiet and smooth with the throttle lifted, but even the small amount of power required to maintain speed on a level road resulted in noticeable vibration and a fairly noisy cabin. This car seemed to make as much power on full throttle as the other two ( based on my seat-of-the -pants accelerometer) and started and idled well.
So, the question is: Do some of these engines run rougher than others, or is there a problem with teh third car? My knowledge of diesels is limited to a vague understanding of teh theory and teh only things that come to my mind are uneven compression, fouled injectors, or bad fuel.
All input is appreciated!
All three cars have around 100,000 kms and appear well maintained. Two of them drove well, with a nicely subdued diesel mutter at highway speed. The third car had a distinct engine vibration at all speeds that could be felt through teh seat, throttle pedal, and steering wheel. At 90 kph the car would run quiet and smooth with the throttle lifted, but even the small amount of power required to maintain speed on a level road resulted in noticeable vibration and a fairly noisy cabin. This car seemed to make as much power on full throttle as the other two ( based on my seat-of-the -pants accelerometer) and started and idled well.
So, the question is: Do some of these engines run rougher than others, or is there a problem with teh third car? My knowledge of diesels is limited to a vague understanding of teh theory and teh only things that come to my mind are uneven compression, fouled injectors, or bad fuel.
All input is appreciated!