Audi s5 b8 2009 misfire cyl 1 idle

[d3signz]

Delete please

[Sofreshs5]

I have a cylinder 7 misfire. My coil packs and plugs are updated. The dealer told me that I would have to replace my fuel injector rail which will cost me $1400. So I am waiting to get my car back. Good luck

[Jake@JHM]

I have a cylinder 7 misfire. My coil packs and plugs are updated. The dealer told me that I would have to replace my fuel injector rail which will cost me $1400. So I am waiting to get my car back. Good luck

Could be just the injector. We are seeing these fail a LOT more often now that these cars are getting older.

https://jhmotorsports.com/shop/catal...v8-p-2299.html

[d3signz]

Hello injector already switched and problem still in cylinder 1...

[new2s5]

When was the last time you had your engine carbon cleaned???

[d3signz]

Hello, I can't find when the carbon cleaning was did.. but last year I removed "intake" and I don't see a lot of carbon on intake valve..

[d3signz]

Check in attachment cylinder intake port valve.

[new2s5]

Hard to tell in that pix. I would make sure that the internals arn't all coked up before you start spending alot of money on parts. Just my 02

[bryantlopez631]

I had a misfire that was getting worse little by little and it turned out to be my fuel injector so I replaced all of them and did the carbon cleaning while I was at it took me like 4hours the carbon cleaning was what was most time consuming after that the car ran a lot better than before and I got 2mpg better


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[d3signz]

yes but its not my problem..

Anyone can help me how solve this?