Misfiring under boost but no cel

[s4BoostKing]

The car runs strong until you go wot and push the boost it starts stuttering like its misfiring and then it smells distinctly like gunpowder smoke.. But there is no engine light one and no cels.. Daily driving is completely fine otherwise

[MacDaddy]

What tune?

[armageddon-]

Aun what ECU? some does not have misfire detection...

[Corradovolksb]

Sounds like spark is being blown out. What plugs are you running and what gap are they set too? With stock coils you want to have gap set at .023-.025 and with fsi coils you want .025-.030

[LightningLou]

Does the car burn any oil by chance? I had that same gunpowder smoke smell when my turbos were shot. Also is your car stock or tuned?

[blackslc5]

Same thing was happening to me @wot but I would get a flashing cel for 15 sec. replaced my spark plugs gapped correctly for my stage 3 tune and I was good to go

[j-dells]

My car is doing the same thing and I got recommend to change to better plugs that are also gaped right. And if that didnt help then to check my fuel system
Line health
Clogged filter
Pump flowing strong
Injectors and rail not restricting
And so on.

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[s4BoostKing]

MTM stage 2 tune. It has misifire detection for sure I use to get the code.. And NGK plugs idk what they are gapped too

[616_S4]

check gap, boost leaks, and make sure that you're up to temp fully, mine would do this when the thermostat was going bad, but now at 26 psi it runs strong.

[blitz2190]

a coil getting weak will also cause this, re-gapping smaller may fix it for a while. I had to swap to fsi coils to get it to be reliable.

[pearlwhite]

Probably not your problem but I was having the exact same issue as you and my fuel filter was very clogged. Changed it and ran so much better.

[AudiTuner1187]

I had same exact issue. Did the 2.0t coil converaion and all was good. You might have a weak coil/icm

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[NOGARO707]

Sounds like you need to update your coils to the newer 2.0t style and delete your icms, made a night and day difference on my car and completely eliminated the "random misfires" code

[616_S4]

Tighten your gap before dropping cash on coils

[Robsa6]

Sounds like spark is being blown out. What plugs are you running and what gap are they set too? With stock coils you want to have gap set at .023-.025 and with fsi coils you want .025-.030

Also use dielectric grease on the plug wires. This is what stopped it for me I had dark tracer lines on the porcelain where the spark was shorting out. AlphaVR is who I learned it from and seems like everytime I have this happen it's what it takes to stop it. Also NGK COPPER plugs will spark stronger and resist being blown out better than the expensive platinum plugs. You just have to change them much more often... Speaking of witch I think I'm due

[s4BoostKing]

Car was sitting for a while but finally getting around to the 2.0 coils and new plugs. My old plugs were gapped to .04" previous posts suggest running around .028" but reading multiple other threads posts say to run around .04"??? I have stage 2, 21psi, bkr7e, and will have the 2.0 fsi coils

[AudiTuner1187]

From what ive seen. Run .028 for stock coils. 0.04 is if your running the conversion, stonger spark, so you can up the gap without them being blown out

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[s4BoostKing]

Fsi coils in plugs gapped to .04" all misfires gone and runs good.. What was originally wrong was the icm was bad for anyone wondering