GIdoc

Hi,
I am hoping someone can clue me in on a problem I'm having. I recently bought a 99 A6 2.8Q(with 50K miles), the battery died(had the original), it would not take a charge form roadside assistance, so I replaced it with another battery(has the vent,). Now the car will start imediately, idles perfect, but then stalls when I put it in gear if I don't give it any gas. It drives perfect as long as I'm giving it gas. It has new plugs(OEM), new oil(Mobile 1) and filter(OEM), and there is gas(use 93octane) in the tank. I checked the grounds and cleaned all the contacts. The car sat for a week with no battery, could this be a problem? I checked the voltage on the battery and the alternator everything is within normal limits(engine off=12.05volts, engine on= 14.1v). Does the car have a IAC or ISV, which might need cleaning? I searched the archives and found that another member had a similar problem after replacing the battery and stated that the Fuel system had to relearn its settings, is this the case?
Any help will be appreciated? And the check engine light isn't on.
If you are in the NOVA/MD/DC area which mechanic do you use?

Perpetual Novice

turn on the engine, let it idle, and then turn on/off the air conditioning compressor. idle should change, but not too dramatically.

I assume this is an automatic transmission?

GIdoc

yes its a tiptronic

quattrorage

The throttle angle on the throttle body must be reset whenever the battery is disconnected for more than half an hour.You'll need to see an Audi tech or have someone with a VAGcom and ALOT of experience to do it

GIdoc

Is this a difficult procedure, or it just needs expertise to adjust? Do you know how much labor is involved? Thanks, I hope this is the answer.
TR

Perpetual Novice

you could use the VAG tool locator to see if anyone close to you would be willing to help<ul><li><a href="http://www.steve-hall.com/cgi-bin/VAG-Locator.pl">Vag tool locator</a></li></ul>

Perpetual Novice

Doh! missed the part where he says the battery was replaced, good call.

GIdoc

Thanks A4_N, but the link doesn't work.

Rando

Hopefully, someone with VAG can help, but in case you need mechanics, try Dr John's Motorsport in Sterling or Curry's in Chantilly/Ashburn. Both are pretty knowledgable.

Bryans12v

It needs a Throttle Body adaption. In the A4, this can be simply done by putting the key in the ignition in the ON (not started)position and let it stand for about 3-5 mins. Im not sure if this aplies to you but its worth a try.

Let us over here know if you need any more help.