Performance & TuningDiagnostic helpCommunity Starter

2023 Audi S5 — conservative tune feels great — what should I log? — anyone dealt with this recently?

BatteryEnthusiast712Community StarterMar 6, 20262023 Audi S5 SportbackDenver

2023 Audi S5 Sportback, about 57,000 miles. I do not want to judge a tune only by how fast the car feels. Which parameters are worth logging periodically if the goal is catching fuel, knock, boost or temperature problems early? Mostly looking for the right next step.

2 replies

BatteryNerd425Community StarterCommunity StarterMar 7, 2026permalink

This is usually cheaper to test than to guess. Move a coil or plug on the 2023 Audi S5 if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. Just my two cents from doing this recently. Happens in gear, not in park, for what that's worth.

DealFan254Community StarterCommunity StarterMar 8, 2026permalink

Same neighborhood, different next step: A pressure test beats staring at a dry driveway if the 2023 Audi S5 is losing coolant with no puddle. That's the branch I'd chase this week. Write the result down so the next test isn't a repeat of the last one. I'd sleep better after that step, even if it finds nothing. Video is ugly but it shows the hesitation.

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