doin my head in

[art52]

i have an 02 a3 that likes to fluctuate (fancy word)its revs at start up and while driving it also sounds like air brakes being applied when the revs die down before revving again forgot to say it is a1.6 sport anybody got an answer i would appreciate it

[a8 tech]

A3 1.6 l - fluctuating idle speed you will require vag com for this and lalso clean out the throttle body before you do this and adapt the throttle body basic setting channel 60 or 98


Problem description

Engine surges when idling, engine speed fluctuates and drops sporadically.

Cause

A specified engine speed of 680 rpm, the desired load recognition through turning the steering to full lock and the recognition of consumers by the alternator, can result in slight engine speed fluctuations.

If basic setting of the throttle valve control unit has not been successful, the idling speed can be increased by approx. 50 rpm. This adaptation is performed in the engine control unit and only functions with the ignition switched on.
Call up engine control unit with 01,
then call up adaptation with 10,
enter channel 01 and confirm.
The line at the top right must show 128 (corresponds to 680 rpm); the new idling speed can be entered in the bottom line in steps of 10 rpm. (129 = 690 rpm ..... 130 = 700 rpm).
In order to return to the original setting, 128 must again be entered

[art52]

thanxs for the reply mr a8 tech i'll clean throttle body as you suggest as far as vag com i'll have to find someone in area as only have snapon scanner

[a8 tech]

Why not nip to dub sport with the info and ask them to try it for you or rs north west at wallgate wigan near eddys motor factors

[art52]

thanxs i'll get back to you and let you know how i've gone on, might be a couple of weeks going on holiday (hooray)