What voltage should I get from Hitachi MAF both engine not running and at idle?

...new ( 2nd Hitachi ) MAF, stoplight switch working, WSM fault finding procedure done & everything OK, Motronic programmed for Hitachi and still getting P0102/115...

I highly appreciate a fast answer!

 

What a floodlike flow of answers...

But, after checking boost leaks again & cleaning the TB I started to be slightly p*****d about continuous MAF fault. So I changed back to OEM Bosch MAF.
No fault codes.
Of course lambda values were off for a while ( I had been driving it and Hitachi MAF's output voltage is significantly lower ), but based on a short test drive it works and now lambdas are getting OK too. The disturbing issue here is that the Motronic should have been programmed for Hitachi MAF and now I do not know what it really contains...hardware is built for upgraded program and if there's a std program for std injectors etc I'm way off. I bought it second hand for my build and confirmed it's program from the tuner, but...
One strange behaviour though, with Hitachi it starts OK hot & cold, but with Bosch hot starts are slightly difficult.

 

Stick with the stock MAF.

 

Is your car tuned for the Hitachi? Have you ask the tuner? You can pull those codes from a boost leak as well, have you boost tested the car?

Tom

 

I never had luck with the Hitachi upgrade.