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Audi 1.8T - problems under acceleration and speed

Hello Audi World

I have an A6 1.8T Quattro 2000 model with 62k miles on the clock. Overall very pleased but over the last few months it has developed a problem which yesterday took a turn for the worse.

Under hard acceleration the engine stutters - it is fine at normal acceleration and to be honest when I first noticed the problem the car was shortly due for a service and so I didn't do anything about it. After the service (non dealer), the problem still exists. However, it has also developed further in that the car exhibits a similar stuttering (like a misfire) at high speeds (over 65mph). This was particuarly noticeable when accelerating - but yesterday it happended when crusing. I was on a long journey back from the south of england fully loaded with kids, wife and bikes.

Something I noticed after I had stopped for fuel is that when I restarted the engine it hunted up and down (about 300 revs) around the idling speed for about 1 minute before settling down.

Anyone have any ideas? Is there a helpline I can call?

Thanks

Simonb

Reply to
Simonb
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Take the car to someone with a VAG tool or emulator and dump codes. There's a good chance your MAF has gone to Heaven, less likely you're dropping an ignition coil. Either can be determined with a tool, and replacement might be covered under Audi's "double-secret warranty" coverage...

/daytripper '00 s4 6spd

Reply to
daytripper

It might also be nothing more than a dirty fuel filter.

T> On 27 Mar 2005 00:58:53 -0800, snipped-for-privacy@gmail.com (Simonb) wrote: >

Reply to
Tony

happended

replacement might

Hi Daytripper. Thanks for the replay. Excuse me for asking but what is a MAF?

Reply to
srjb32

Mass Air Flow sensor. Fancy name for fancy piece of heated wire that sits in the induction airflow. The extent that the heated wire is cooled by the air flowing over the heated wire tells the ECU how much & how dense the intake air is so the correct mixture can be dialed in.

Unfortunately, the induction system is not a benign environment for the MAF, they get killed over time by intake nasties...

/daytripper '00 s4 6spd

Reply to
daytripper

Check the Throttle Body and perform "adaption", then it could also be the N75 valve and if the car is chipped the stutter would be more noticeable. That is, if the MAF is OK and the filter comes clean.

JP Roberts

P.S.: Had to replace the Throttle Body Unit because of a similar problem.

"Simonb" escribió en el mensaje news: snipped-for-privacy@posting.google.com...

Reply to
JP Roberts

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