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Title: A3 3.2 VR6 – Surge on Lift-Off & Downshift - 022906032CB - ME7.1.1 Post by: redrum667 on April 25, 2025, 06:51:00 AM Hey everyone,
I’m running a 2005 A3 3.2 DSG. I just flashed a stage-1 file from my tuner—EVAP and SAI coded out, speed-limiter removed, "big pop&bang" added. My previous file was a simple pop-only tune with roughly –30° of extra retard on over-run and it behaved perfectly. Since the new flash, the pops only come in above 4 000 rpm. The moment I lift in that range the engine gives little bursts of thrust; it’s even worse if I downshift there, for example, cruising in fourth at about 3 500 rpm, paddle down to third and land around 4 300–4 500 rpm the drivetrain grabs forward two or three times as if I were feathering the throttle, even though my foot’s off. It feels like the box is re-engaging repeatedly rather than the clutches slipping. I can reproduce the same mini-shoves in Park or Neutral: rev past 4 k, release the pedal, and the engine still nudges the car. The new pops also sound noticeably richer more of a “fat” boom than the dry crack I had before. I haven’t done a full log yet, just a quick first-gear pull to about 5 000 rpm followed by pedal off. Even on that short run the injectors never cut (around 2 ms all the way down), the throttle plate stays stuck at roughly 20 %, lambda hovers near 0.90, and the ECU keeps telling the DSG it’s making 0 Nm while the car is clearly pushing forward. I’ve attached both BINs (pop-only versus stage-1) plus that short VCDS CSV. Any ideas why the engine keeps adding those little bursts of power on lift-off especially right after a down-shift in the pop window ? Regards Title: Re: A3 3.2 VR6 – Surge on Lift-Off & Downshift - 022906032CB - ME7.1.1 Post by: fknbrkn on April 25, 2025, 03:00:35 PM ask your 'tuner'
Title: Re: A3 3.2 VR6 – Surge on Lift-Off & Downshift - 022906032CB - ME7.1.1 Post by: _nameless on April 25, 2025, 04:33:09 PM Hey everyone, Timing changes in kfzw/2 will do that, shitty solution for pops and bangs I’m running a 2005 A3 3.2 DSG. I just flashed a stage-1 file from my tuner—EVAP and SAI coded out, speed-limiter removed, "big pop&bang" added. My previous file was a simple pop-only tune with roughly –30° of extra retard on over-run and it behaved perfectly. Since the new flash, the pops only come in above 4 000 rpm. The moment I lift in that range the engine gives little bursts of thrust; it’s even worse if I downshift there, for example, cruising in fourth at about 3 500 rpm, paddle down to third and land around 4 300–4 500 rpm the drivetrain grabs forward two or three times as if I were feathering the throttle, even though my foot’s off. It feels like the box is re-engaging repeatedly rather than the clutches slipping. I can reproduce the same mini-shoves in Park or Neutral: rev past 4 k, release the pedal, and the engine still nudges the car. The new pops also sound noticeably richer more of a “fat” boom than the dry crack I had before. I haven’t done a full log yet, just a quick first-gear pull to about 5 000 rpm followed by pedal off. Even on that short run the injectors never cut (around 2 ms all the way down), the throttle plate stays stuck at roughly 20 %, lambda hovers near 0.90, and the ECU keeps telling the DSG it’s making 0 Nm while the car is clearly pushing forward. I’ve attached both BINs (pop-only versus stage-1) plus that short VCDS CSV. Any ideas why the engine keeps adding those little bursts of power on lift-off especially right after a down-shift in the pop window ? Regards Title: Re: A3 3.2 VR6 – Surge on Lift-Off & Downshift - 022906032CB - ME7.1.1 Post by: redrum667 on April 25, 2025, 04:38:24 PM ask your 'tuner' Thanks, I hadn't thought of that Timing changes in kfzw/2 will do that, shitty solution for pops and bangs Oh okay! I thought it was the way to go, thank you for sharing this <3 |