Slight vibration on idle

[Saffer]

Hi all,

I have a 2001 A4 tdi 1.9

The car vibrates a bit more than one would expect when idling(although the rev needle remains very still), but this smooths out if I switch on the aircon fan. Is this idling setting or maybe a mounting issue?? also when I hit 140km per hour.....naughty I know....it vibrates slightly. I have done wheel balancing and still the same thing.

cheers guys
Saffer

ps. its 27degrees in Durban today and im just off to the beach

[RickT]

When you say turn the AC on???

do you mean press the ECON button to turn the aircon off?? (so the Red LED is on??)

Is this a B5 or B6 as it changed in 2001..

Also 140KM is not naughty......... i tend to say just under 90-100mph... which is about 160KM.... unless its a very clear bit of motorway...... i have had it up to 135MPH (217KM) but then bottled it... ...
Obviously on a private track.................

RicKT

[Saffer]

Hey Rick,

Thanks for the reply, ill have to check the B5/B6 issue. When I put aircon on (not econ) and take the fan up to about 3 or 4 of the "bars" you see on fan strength displaythe vibration stops. I tend to think it is not idling issue as I said the rev needle is very stable. Do you think its a mounting bracket or something

Have been up to 270kph but that was a M3 CSL driven by a mate who is a race driver.....scary stuff

Cheers
Rian

[RickT]

Heres the model list below...


B5
1996-2001.5 Audi A4 / 2000-2002 Audi S4 & Audi RS4



B6
2001.5/2002-2005 Audi A4 & Audi A4 Cabriolet / 2004 Audi S4


B7
2005.5+ Audi A4, Audi RS4 & Audi S4

RickT

[Saffer]

Hi Rick,

I believe the one I have is the B6 model.

Cheers
Saffer

[Anzee]

I mite be incorrect on this but i think your Air Filter may need cleaning out...

I had the problem in my Golf that the cars Idle meter jumped ever so slightly making car bounce...

Im sorry if this aint helped.

[RickT]

Air filter wont make it run rough... unless it complety blocked...

Start off by doing a quick simple service... Air filter, oil Filter, Oil,

also... im thinking it could be B5 as the B6 does not have a button which say AIRCON or A/C

Is yours like this... B5
http://cgi.ebay.co.uk/AUDI-A3-A4-CLI...ayphotohosting

or like this B6..

http://cgi.ebay.co.uk/AUDI-A4-CLIMAT...ayphotohosting

Cheers

RicKT

[Saffer]

Hi Rick,

I believe I have the same unit as the B6.

But following on from Anzee's suggestion the car has allready been booked for a scheduled service on the 17th Jan with the ***********. I will let you know after if that did the trick.

Cheers guys and thanks
Saffer