From hot wire to hot film with motronic 1.7

[a french man]

Hello every body

I'm from France and i apologise for my bad English

I have a big problem and i vesper found answers to my problems

I decide to change MAF on my BMW 850i
my bmw 850 have built in 1991 with hot wire MAF and i decide to change for Hot film MAF

original Bosch part is : 0 280 211 007 with potentiometer idle

i want to change to : 0 280 218 019 without potentiometer

i have two different eproms (one for each DME )

I think MAF map is the same in each DME

what can i change (and what i must change) in each eprom to change MAF ?

for potentiometer i can make a special electric circuit it's not a problem

have a good day

i wesper my problem is not impossible

Hervé from south of France (Nice)

for more information : Herve131171@yahoo.fr

[prj]

1. Both MAF's have to be voltage, not frequency based.
2. If there is no MAF linearisation table in that ECU, you will need to either add one or create a circuit, which will be ADC -> uC -> DAC and convert voltage in the uC.

GL.