Hello,

i have a 1999 A4 quattro manual wagon. Only higher octane gas is used. Battery was recently replaced.

This used to only happen at high speeds....
I would be on the freeway doing 70 and give it a heavy stomp on the pedal and the car would hesitate or stutter a bit, then take off.
However, I wouldn't do that to the car very often...

Now while normally accelerating out of a traffic light, the car stutters a bit.
if it doesn't stutter at that point, if i am in any gear and start to drive aggressively, the car jerks or stutters.
It is getting to the point that it may become dangerous to drive.

When the car has no load on it (in neutral), it revs perfectly fine. It is only while in gear.

I am going to start with some fuel injector cleaner.

Any other leads to the possible problem would be appreciated.

Thanks!

-josh

 

If it only happens in gear, it sounds like it could be a transmission problem.

 

I reset the throttle body (by disconnecting the battery for a minute, then connecting it and turning the key, wait for the throttle body sound to cease, then start the car).
after that, put in a fresh tank of gas with injector cleaner. so far, so good. car has used 1/3 of that tank of gas and runs fine.

 

Glad to hear it. I have a Volvo 850 that just had the throttle body go up a few weeks ago, same symptoms. Don't know why I didn't think of that earlier...

 

It happened again. it got really bad. turns out the #2 coil pack went out. now it runs like a dream.

 

I was going to say misifre...

Audi should have recalled AEB coil packs years ago.

 

What causes these coilpacks to go out so frequently?

 

There is an element (coil) inside each pack that gets crispified with time. The heat is what kills it. Newer ATW and AWM coil packs don't have early failure like AEB.

 

Audi recalled the coil packs,i got 4 brand new coil packs,installed by my local audi dealer,free of charge about 3-4 weeks ago,i posted a video on my visit to get it done.

http://www.youtube.com/watch?v=Bk0mjAVZyBY

http://www.youtube.com/watch?v=sA2g_0XhjQ8

http://www.youtube.com/watch?v=2ANzJ09LEfA

http://www.youtube.com/watch?v=Cso-B_EMAtg

 

Alrighty. I'm sort of speechless here... What exactly is the meaning of those videos? I don't get it.