Hey guys,

The Audi is driving very poorly.

The Oil Pressure light comes on sporadically during warm weather highway driving, ever since I owned it but I ignored it since Audi’s are notorious for false codes and defective sensors.
Replaced sensor and checked oil pressure. We’ll see….


I also stupidly pulled a Kramer and allowed the car to run out of gas about 2-3 weeks back. Sediment in fuel lines, fuel filter or fuel pumps? I do tend to overdo the engine additives (to increase compression-to solve oil pressure warning…..) and gas additives at gas fill ups…… bad O2 sensors or cats??

Lastly, I had to replace my mass air flow sensor about 5 weeks ago. A generic cheapie or installed wrong, is that possible? The idle is fine, although a tad jumpy.

The car drives fine otherwise but it just does not seem to have the same zip it had just months ago, it seems to lack power and proper kick down.

My wife as a 1995 Jag XJR and it has wayyyyyyy more torque, pickup and acceleration even power, than my newer 2004 A4.

My thoughts are either bad O2 sensors (check engine light indicate bad sensor ONCE a few days ago but not since) or fouled or clogged cats.

Ideas? Desperate!


Thanks,

Keith.
Mt View, CA

 

Jeezzz, over 200 views and no one has an opinion....

 

do you have any cel on right now? the sensors are normally right when something is wrong. at least it points us in the right direction to where the problem might arrise from.

 

CEL? No codes thrown currently but we did get a CHECK ENGINE light for a 30mins (we cleared it) earlier this month, indicated a bad O2 sensor. No warning lights on since.

Thanks!

 

you have clogged cats! plus our cars hate fuel additives! u will end up clogging up the lines with that stuff and causing more damange then harm....