2 Attachment(s)
MPI and basic "flex fuel" working on MQB/SIMOS18 2.0
Hey guys, I have successfully enabled MPI and fueling-correction-only "flex fuel" with HP Tuners.
2017 Audi S3 w/ PR 925cc MPI kit w/ continental ethanol sensor.
First log is cold start. Once the wideband comes online you can see STFT increase to correct. Then around 2 mins in or 10:31, the ECU starts using the learned ethanol content and fueling is spot on. This is about E35 in the tank, using SAE PID 01 52 to display E content--also works with generic OBD scanner/phone app etc.
Second log is a quick WOT log. Tune is super conservative and not complete by any means, but note that "Injector Pulse Width 1 Cyl 1" is DI pw and "Injector Pulse Width Cyl 1" is MPI. I have it triggered to activate around 250 lb-ft.
https://i.imgur.com/tFgKt76h.jpg
https://i.imgur.com/AYYXpDj.png
https://i.imgur.com/XxHRmAd.png