dip in revs while sitting idleing

[bingobaz]

anyone any views or have had this problem, and can point me in the right direction.

help slighty worried S3 owner!

[david7m]

Possible your MAF sensor.

VAG-COM would tell you

Dave

[harry]

or air-con condenser unit kickin on??

[david7m]

Is it lumpy when warm or cold?

Dave

[bingobaz]

i would say its lumpy when its cold, once its heated up it goes good, just now and then wehn sitting at lights or summin it tends to dip.....

may i ask what VAG-COM?

[harry]

Its a software package that plugs into the engine management portal in your car and reads any fault codes stored. Gives a wealth of info and seems to be an invaluable tool. Used by Audi workshop but the software is also available to buy over t'internet., and you simply upload it on to your laptop. Do a search for VAG-COM in the electrical forum on here and all will be explained ma loon.

[bingobaz]

Cheers H
but what is the connection needed?

[harry]

Yeh soz u need to buy a cable aswell but that info will aslo be on this site too. I dont have one myself but there's a couple of lads round our way that do. The portal is situated towrds the rear of the centre consul beside the ashtray for the rear passengers (well is on my RS4 anyway) Far dya bide min?

And what colours yer mota?

[4193coope]

hi guys - can u help?

just along the same lines as dave, my s3 8l has problems when idling.
i,ve run vag.com on it and got no error codes and the following re air flow - i,m getting 186 g/s at 5800 rpm and 2-3 g/s when idleing. see below. does all this look normal?

thanks - gavin

Engine Rpm Engine Load Ave. Inj. Period Air Mass Flow

TIME
STAMP /min % ms g/s
0.01 720 22.6 2.04 2.69
0.4 720 23.3 2.38 3.03
0.9 720 21.8 2.04 2.89
1.33 760 23.3 2.38 3.06
1.7 720 22.6 2.04 2.89
2.1 720 23.3 2.38 2.69
2.51 720 23.3 2.04 3.17
2.93 760 22.6 2.04 2.67
3.44 720 23.3 2.38 2.97
3.93 760 22.6 2.04 2.89
4.33 720 23.3 2.38 2.83
4.73 720 22.6 2.04 2.86
5.12 760 23.3 2.38 2.89
5.54 760 22.6 2.04 2.81
5.92 720 23.3 2.38 2.92
6.33 720 23.3 2.04 2.89
6.75 760 23.3 2.38 3.03
7.14 720 22.6 2.04 2.58
7.55 760 22.6 2.38 3.17
8.06 760 21.1 2.04 2.97
8.46 760 22.6 2.38 3.11
8.85 720 20.3 2.04 2.67
9.26 760 20.3 2.04 2.67
9.66 720 20.3 2.04 2.36
...
181.27 3280 103.8 9.52 74.08
181.71 3520 133.8 11.56 102.42
182.22 4000 184.2 14.96 155.75
182.69 4600 191.7 18.02 173.78
183.1 5040 184.2 16.66 174.42
183.5 5440 174.4 15.98 180.17
183.91 5800 169.9 15.3 186.53
184.31 6120 56.4 4.08 72.25
184.71 4320 115 10.54 113.11
185.1 4320 166.2 15.3 152.75
185.55 4360 50.4 3.74 1.14
185.9 4360 11.3 1.36 6.28
186.33 4360 12.8 1.36 6.89
186.7 4080 12.8 1.36 8.31
187.11 3280 13.5 1.36 8.25