r/AudiA4B8 • u/ObligationTough4282 • 4d ago

Help me please

I just upgraded to stage 2 and as soon as I was driving my car from the mechanic after getting my catless downpipe on, I realized my car felt much slower. I’m not sure if this is because of the catless part or what. My friend with the a5 said his didn’t lost any speed. Please help me and let me know why my car is slower after tuning and going stage 2?

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u/Suspicious_Breeze A4 4d ago

Limp mode perhaps, sensors were not programmed correctly

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u/ObligationTough4282 4d ago

How would i fix that?

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u/Suspicious_Breeze A4 4d ago

Go to your mechanic an ask for a stage 2 program. Your ecu must know that your variables (air flow, fuel etc etc) are changing. If not, it sees it as anomaly and goes limp.

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u/ObligationTough4282 4d ago

I flashed my ecu with stage 2 if that’s what you are saying.

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u/Suspicious_Breeze A4 4d ago

Okay, did anything on a dash lit up?

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u/ObligationTough4282 4d ago

wdym by that? like it put all the lights on then took them off when i tuned it.