Audi A3 3.2 poor idle

Simon · 2 Sep 2010 at 15:15

Mates Audi A3 3.2 (04) has a poor idle especially when hot, its rough at low revs which seems to clear at 2,500rpm -3000rpm

Car has done 70k miles.

Any common problems, I have read about stretched cam chains causing timing issues, and also lazy lambdas. The dealership can't seem to find any problems.

Will Gill · 2 Sep 2010 at 15:41

no idea if its the same but on scoobs and porsches when that happens its the MAF

on the S2k it was the cam sensor(?) and to fix it you hit it with a hammer

The Running Man · 2 Sep 2010 at 16:00

maybe start by cleaning the throttlebody with like TB cleaner or something to ensure the butterly is closing fully?

thats a cheap way to start

Siliconslave · 2 Sep 2010 at 16:05

get it hooked up to a vagcom and check if its miss firing - if so its most likely to be a stretched cam chain and a very hefty bill

233 · 2 Sep 2010 at 16:09

Siliconslave said:
get it hooked up to a vagcom and check if its miss firing - if so its most likely to be a stretched cam chain and a very hefty bill

not always,

i had the same symptons with my 4motion(more or less the same engine) and it was needing a new cam sensor. easy job and the sensors not dear.

Matt82 · 2 Sep 2010 at 16:55

another thing id check is for logged misfires, they can do odd things on 6cyl lumps

vagcom is definately the answer though

classicVin · 2 Sep 2010 at 17:15

coil packs are quite common on the v6 lumps

Simon · 6 Sep 2010 at 09:18

Cheers for the info.

SeatIbiza · 6 Sep 2010 at 11:35

My RS4 did this once - couldn't track the problem down through vag com.

Changed the Maf and both lambda sensors and problem went away...

If the lamda's are dead it will overfuel - mpg down at all?