Fly by wire over-rev between gears

**varicosewayne** · 27-04-2009,04:33 PM

Hi I have just moved on from having a mk2 16v and now have an a3 quattro sport.

I have noticed that it over revs between gear changes and have been told this is due to the fly by wire throttle control. Does anyone know of a solution to this problem, I would much appreciate advise. thanks

**SEMKY** · 27-04-2009,10:41 PM

Hi Mate,

Suffering the same issue with mine. Has been diagnosed by several to the clutch pedal switch...seems to fit being that I had a new clutch pedal and cylinder replaced by a non specialist and the clutch pedal switch ain't there anymore.....have been away at sea since then so I haven't had chance to get it sorted, and either prove/disprove the theory.

I am hoping that this is the issue anyway....quite sure there may be other answers though.
Good luck!

**varicosewayne** · 28-04-2009,09:34 PM

Oh ok that sounds posible, suppose it gets the revs down quicker when it knows the clutch has been ingaged. I just thought thats how the car was ment to be

Cheers for the info mate, i'll look into it. (let me know if thats the problem on yours)

**Crasher** · 28-04-2009,09:37 PM

The clutch pedal switch tells the ECU you have pressed the clutch so the revs drop faster, it is a common failure and can be checked in Measuring Blocks 08 if you have access to diagnostic equipment.

**SEMKY** · 29-04-2009,12:05 PM

Nice one Crasher!

Will be checking it this weekend hopefully and will report back! Fingers crossed!

**varicosewayne** · 30-04-2009,04:55 PM

yea thanks crasher, will have to take it to my mate at kwick fit and whack it on the machine

**varicosewayne** · 01-05-2009,10:13 PM

yep put the car on the tester and sure enough it came up with the p1539 clutch switch improbable error. got the switch coming, probably sort it monday. thanks again.

**SEMKY** · 03-05-2009,08:51 PM

Nice one! Didn't manage to get home to do mine this weekend...hopefully will be the same thing on mine!

**SEMKY** · 19-05-2009,04:58 PM

Right then, I have been hooked up to VAG-COM at Votex, no fault codes were stored, but I still have the over-rev, and still can't see a switch where the drawing says it should be! Were all S3s fitted with a switch? Would bypassing the switch in some way prevent a fault code being registered?

Any thoughts gratefully recieved!