Hello,

Im working on a R32T setup and I ran into some issue with MAF voltage. At 0.8b, the signal from the original R32 MAF/housing stopped at 5V - the end of MAF sensor resolution. Not wanting to change the MAF housing, I decided to put the MAF sensor from the RS4 B5, so I switched from HFM-5-8.5 to HFM-5-9.7 as the sensor from the RS4 B5 have different characteristics and can measure higher flow rates in the same housing.

After properly scaling the MLHFM, I find that on the same boost I hit the ceiling at 4.62V and signal get's flat.

Anyone have any idea why this is the case? Doesn't the sensor from the RS4 B5 have a measurement range of 0-5V?


Thanks

Hey, prj thanks for your reply. Forgot to attatch the log. I think there is still a problem, as soon as uhfm_w get's flat lambda correction runs away on + 16-17% and ESP light start's flashing. I have checked all diagnostic functions and mldmx_w is 833g/s through the whole rpm range so it shouldn't trigger anything. Any one has an idea where should I start to dig?

Looks like mehanical issue, some flow restriction