Kentuckyjr

New on the board here, so sorry if this is a repeat question. Having an issue the local dealer has not seen before. I took it to another shop that specializes in german autos and they "guessed" it was the pcv valve. I then decided to take it to the dealer. Dealer didn't think it was the pcv. No faults are showing. 2018 S7, 72K miles, transmission serviced and thermostat replaced at 60K miles. about 1,000 miles ago, a minor rpm surge started occurring after I come to a stop. As I'm decelerating, the rpm settles in around 800rpm between 15mph and 0mph. But as soon as the car stops (i.e. 0mph), the idle drops to 600, jumps to 1,100rpm, then settles back at 600rpm. This surge happens in <1 second. Otherwise the car drives great. Averaging about 22mpg mix city and hwy. I tried to post a video. Any thoughts? Thanks.

Kentuckyjr

Update from Audi: "working with tac on solutions, gff scan and found no faults, looked for tsb and found none. checked foor vacuum leak, none found. removed throttle plate and cleaned, than readapted to ecm. road test. and no better. checked trans fluid level and readapted trans clutch kiss points. road test and no better."

hopkinsd21

I wish I had something for you. Never had to deal with the before. In my expierence with my S7, I usually start with a Google Search... Audi S6 <fill in blank issue>. There are many more S6s and what people do with them than S7.

If you know this... my bad.

A quick Google search, people had the fluids changed in the Trans, PCV issue, and or had to get their clutches replaced. Again, quick 1 mins search and a couple of threads I read.

I am following incase you solve.

Kentuckyjr

Thanks- I picked up my car to give them time to discuss diagnostic Plan B with their tech experts. Maybe a week, then I'll call. In the meantime I'll do some S6 searches as you said. I think it might be trans related, so we'll see.

hopkinsd21

I see you are getting more feedback on the S6 forums. This is where I find most of my info and try to share here on the S7. Hope the best for you.

Kentuckyjr

yes, thanks for the recommendation. Found 2 others that share my misery. I'll contact the Audi shop today (my weekly call) to see if they have a diagnostic plan and will come back here and update if we have any break-throughs.