MS3 dropping AFR value at ~4700rpm
Posted: Thu Dec 28, 2017 5:39 pm
Hi,
So currently I have a problem with a BMW M52TUB25 "dual vanos" engine running on MS3 1.5.1...
I have attached the plot from the DynaPack and MSQ. Issue is at around 4400-4800rpm the AFR value drops down below 10 and engine suffers enormous powerloss when boost comes on.
I have tried increasing Dwell without luck, and specifically removing a little fuel at specifically 4700rpm only to get a great spike before drop in AFR value.
Running engine without VANOS connected.
Specs are SuperT70 turbo, Siemens 850cc high-Z injectors and MS3 V3 ECU.
MS3 specs: Hijacked the 14CL36 ignition drivers from OEM ECU, running IRLR3103 mosfets for each injector MS3X style.
Tips and tricks are welcome!
So currently I have a problem with a BMW M52TUB25 "dual vanos" engine running on MS3 1.5.1...
I have attached the plot from the DynaPack and MSQ. Issue is at around 4400-4800rpm the AFR value drops down below 10 and engine suffers enormous powerloss when boost comes on.
I have tried increasing Dwell without luck, and specifically removing a little fuel at specifically 4700rpm only to get a great spike before drop in AFR value.
Running engine without VANOS connected.
Specs are SuperT70 turbo, Siemens 850cc high-Z injectors and MS3 V3 ECU.
MS3 specs: Hijacked the 14CL36 ignition drivers from OEM ECU, running IRLR3103 mosfets for each injector MS3X style.
Tips and tricks are welcome!