I have a 1993 Audi 90 CS startes but runs rough and very sluggish when you are driving it . It acts like it is out of time. I don't beleive you can change the timeing on this car.

Asked by Jul 05, 2012 at 10:49 AM about the 1993 Audi 90 CS FWD

Question type: Maintenance & Repair

3 Answers


Check your catalytic converter. The symptoms you describe are par for this problem. One way to get an idea of the condition of CAT. is to listen to your exhaust if it is making more of a hissing noise you most likely have blockage.

Just listed to the exhaust it is not making a hissing noise and when I put a dollar bill up to it it is not sucking it in. it has 2 cats (each side of v6 motor) not just 1. I was thinking it may be the cat but its not showing any other symptoms as in the hissing, blow back, or no to little exhaust coming of the out. I don't know much about the audis but motors all have the same basic concepts. Since I posted the first question I pulled the air filter and ran it and when I revved it up it got louder then normal motors do out of the air intake. Any other ideas.


Does it backfire at all?

Your Answer:


Looking for a Used 90 in your area?

CarGurus has thousands of nationwide listings and the tools to find you a great deal.


Audi 90 Experts

  • #1
  • #2
  • #3
View All

Related Models For Sale

Used Audi V8
2 listings
Used Audi S4
23 Great Deals out of 1,356 listings starting at $2,999

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use.