I have a 1998 Audi A6 2.8 V6 quattro, 142KW engine. Over the last 2 days, I am experiencing severe judder when I accelerate under load. The judder is present at all speeds particularly going up hills. The judder is quite violent and feels like massive engine advance or retardation. There is no missfire and as stated previously, the judder is only present on acceleration not on level driving or down hills.
Where do you feel the judder? Does the whole car shake and do you feel it in the seat? In the steering wheel? Does it seem to be tied to engine speed or road speed?Does the power seem normal?
If you will get back to me with the answers I will try and further assist you.
Jake "THE AUDI DOCTOR"
The Judder is from the engine at all engine speeds and felt thoughout the car only for a few seconds on acceleration (under load). I get this in all gears whether I am driving at 20 or 70 mph.
The power is normal and the fuel economy is the same.
How do you know it is not a misfire, as that is what I would usualy expect to be the cause? Is the check engine light on?
I am sorry I have to leave. I will "Opt out" so as to open this question for other experts. Should it still be open upon my return I will try to further assist you.
There is no engine light, the judder only lasts for a few seconds when the engine is under load. After a few seconds, driving is normal. There is no judder with a quick heavy throttle or when accelerating down hill or on a level road, only up hill. Tick over is fine and engine temperatures are normal. As I said in my earlier email, it feels like engine advance/retardation with a delay of a second or two but this jerks the engine violently. There is no judder with deceleration or a sustained engine speed, only when you momentarily blip the accelerator to overtake or drive faster.
Hello Just Answer,
Still awaiting a response from your expert who declined. Are there any others?
My question was never answered
I am sorry nobody has assisted you. I think perhaps the reason may be that with out having any "codes" to go by and only your description, there are so many possibilities. We (I) can not ascertain over the internet if it is a physical drive line problem (axle of drive shaft), a transmission or engine problem. So I can't imagine where to start. Descriptions and interpretations are the most difficult part of this service at times, and I feel this may be one of those cases.
I suggest you take the vehicle to a repair shop where they can test drive the vehicle and do some "hands on" testing to determine the cause.
Thank You. I hope you will give us another chance in the future.