hi guys i got a audi a4 1995 got problem with the rev gauge if i gave it a rev it will keep going up and down and then it will start shaking and then it will just stop only happen if i gave it rev had air senson replace and the lambda sensor any ideas ? thanks

 

How much is it fluctuating by?

 

hi i would say lot it goes over and under the 1000 mark

 

Possible low fuel pressure or a bad idle control?