AUDI RS4 B7. Lumpy power delivery.

[B7RS4]

Looking at any advice on slightly lumpy power delivery under power, not sure if it is the tyres, fuel pump, any ideas or checks i could do to maybe fix this? its not bad just a little annoying sometimes. 

[cliffcoggin]

David.

It might help if you gave a more detailed explanation of what you mean by lumpy power delivery, along with conditions at which it happens. Conditions like engine speed, hot or cold, load, service history, state of tyres, etc.

Edited May 25 by cliffcoggin
omission

[B7RS4]

Thanks for the reply, it seems bad when cold but when warmed up , in S or not it just pulls well for as long as i need it to but sometimes feels a little missfireish? traction control light doesn't flicker and it makes no difference if i turn it off. its not really bad but noticeable, maybe pulling through from say 2k to 6k its a little lumpy but then when its on its at the top end its fine. not sure if it fuel filter? pump? or it is the really bang average tyres it came with? maybe its just an aged v8?

Edited May 25 by B7RS4

[Steve Q]

I'd recommend a diagnostic check to see if any fault codes flag up. Could be an issue with the cam sensor, lambda sensor, maf sensor. 

[B7RS4]

22 hours ago, Steve Q said:

I'd recommend a diagnostic check to see if any fault codes flag up. Could be an issue with the cam sensor, lambda sensor, maf sensor. 

Ill get it plugged in thanks

[Steve Q]

Please keep us posted on how you get on