Hello all,

This is my first post on here after creeping for quite a while. I drive a 2013 B8.5 Audi A4 APR Stage 1. Recently, I have been noticing some symptoms that seem to be consistent with a spark plug or coil pack issue. These are:

-Slightly louder idle and distinctive change in sound when accelerating
-Clicking when accelerating (only briefly)
-RPMs slipping and occasionally getting stuck briefly. (Is that a "misfire"?)
-General noticeable lack in performance and acceleration. Feels a little sluggish.

Questions:

1. Does this sound like a spark plug/ coil issue?

2. Do Audi's have both a coil pack and a spark plug? (Unclear from google)

3. Which one should I replace, if they have both?

Thanks in Advance Guys!

P.S: No CEL

 

Yes, your engine has a spark plug and a coilpack per cylinder. Generally a misfiring coil will eventually throw a CEL. You might try a code reader. I have seen CELs go on and then off when the symptom cleared -- they do not always stay lit. As far as the symptoms, taken together they do not sound like plugs or coilpacks. Just a guess here, but the noise and sluggishness sounds like a diverter valve issue, although I do not know if the 2.0T uses them or if the oem is weak. I replaced them on my A6 when it was chipped as a precaution.

 

+1 on what ppgoal said

The safest thing to find out what is going on would be to check the codes with a VAG-COM. A generic OBD2 reader will probably not be able to find the codes you need as they could be stored internally and many devices do not talk on that level.