so i just bought an Automatic 03 A4 1.8T with 95k miles as a gift from me to me for my birthday. When i went to test drive it, it had an issue that i couldnt put my finger on but i bought it anyways because the service records were outstanding (new turbo, tires, axle assembly, timing belt, some ignition coils all done between 83k and 90k)

the issue is that it makes a quick jerk at low RPM, seems to be any time between 1st and 3rd gear (they change so fast its hard to tell). This is only really happening when I start from a stop. Occasionally feel it on a cruise. So i drove it around monitoring the RPM closely, went very slowly (not even 10mph) and it seemed to make the jerk around 1200RPM. Then i would drive it normal traffic speed (35-45MPH) and it would occur from 1600-2000RPM around the time the gear shifts. Then i pushed the accelerator to 3/4 and the RPMs would shoot to about 3200 and idle until i pushed farther and then the turbo would kick in better; but i didnt feel the jerk when doing this. Now here's the tricky part - I switched it into tiptronic and drove slowly to 3000RPM in 1st gear from a dead stop a few times, each time i felt the jerk around 1600-2000RPM depending on how hard i was accelerating - but i wasnt shifting so i figured this couldnt be a transmission problem. Keep in mind that this jerk didnt occur when downshifting or slowing to a stop, only after a start. And i only feel it jerk one time each time, it isnt a rumble feel or a stutter, just a very brief jerk.

Everything in the car seems stable, it runs fine, starts immediately, drives perfect. Except for this little jerk and it gets annoying because I drive in a high traffic area with constant stop/start and that is when it occurs as it seems.


i posted this in troubleshooting but nobody responded on it

 

bump.

 

Willkommen to the forums!

try posting your question in the A4 B6 section. there is more traffic in the model sub sections of the forums. you probably wont get too many views in the new member welcome section or the troubleshooting section. you will still get views, just not as many. sometimes it takes a few days before some of the tech types will latch on to a question.

anywho, as to your issue, the first thing you should do is get a scan with a vag specific scanner (vag-com). it will let you know if there are any trouble codes coming from the TCU. if you have no transmission codes, try new fluid. not a transmission flush, just drain and replace. it is DIYable but can be a tricky procedure. if you still have problems, well, that is when things get "interesting". start with the scan and go forward from there


good luck

have fun

 

i have posted it there and nobody answered, im gonna go to some places and get it checked out

 

yeah, I saw your other threads. I didn't realize you have the CVT. That can be "tricky". Apparently some of the Audi CVTs have..."issues". I think you are on the right track though. take it to a pro and get it evaluated.

good luck