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  1. Audi A5/S5 Tech DIY
    Hi, my S5 (2008 CAUA engine) with 212k km / 132k mi started misfiring on cylinders 1-4 (whole right bank) every time when I hit 4,3 - 4,5k RPM. During this, the Check Engine light starts flashing and turns off as soon as I put the engine under load at low RPMs. VCDS's freeze frames suggest that...
  2. S5 General Q&A
    Hi guys, new to this. I have set up a finance on an Audi S5 V8 quattro, had it for a week now and was putting normal unleaded 95 RON fuel in, only £30 her and there through out the week. It was due to go back for a service on Friday at the same dealership I got the car from. Picked the car up...
  3. S5 Performance & Mods
    I walnut shelled my 2008 S5 with 40k miles on it, and in 10k miles I'm again getting random misfires cylinders 3, 6, and 8. I plan to swap the coil packs and maybe look at the spark plugs. They're the right heat range and size but they are the cheapest NGK R's I could find at a hair over a...
  4. S5 General Q&A
    Hey everybody. Has anyone had any issues with cylinders misfiring? I'm not too mechanical so I apologize, but my S5 has been in the shop three times with an annoying hesitation on start up (after I start going it stops). The dealer determined that there was excessive carbon build up (as many...
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