schmitzie

Hey guys, new to this forum. Having a little trouble tracking down an answer. Search turns up all types of answers for sounds, but not quite like what I'm hearing.

Setup is 2014 S4
- Chipwerke Stage 1
- Injen intake
- Downpipe back custom magnaflow
- Mileage 110,XXX km

Typically car sounds tight, engine is quiet, exhaust is a little boarish between 1500-2500rpm, and very trumpetty above that. Exhaust system mimics aftermarket downpipes with AWE touring. Exhaust was replaced due to failing flexpipe on the DP section.

I didn't notice before the exhaust or piggyback tune, but certainly afterwards, that the engine note and engine itself switches from trumpetty to practically Chevy pickup truck V6 rough (if that makes any sense). The times it does this is in visible moisture (rain, snow or fog), OR strangely going around a left hand sweeper between 90-110km/h (60mph) in 3rd sometimes low 4th gear. Right hand sweepers, no problem. I've had Ignition coil failures on the VR6 back in the day and no how those feel, and while the roughness is sort of similar, I see no power loss.

I had the wheel bearings checked for wear, drivetrain was reported as being tight, and I have no codes.

One thing I failed to do was unplug the battery for the magical 24hr reset for the Chipwerke tune. I may do that next, but am unable to see how that would fix the strange noise that is produced by the engine (it increases and decreases in intensity based on throttle and in the case of the turning how hard I crank it into the turn).

I want to make sure - while its still under warranty - that its not something quattro related, but because of the fickle nature of the noise, the shops aren't able to replicate it and are having difficulty distinguishing the noise in the videos I have taken.

Anyone have any guesses or experience something similar with their S4s.

Thanks guys,

Drive safe.

S.

schmitzie

Sorry guys, wrong sub forum!

S.