Hi! It caught me, even though I am not precisely a new member, that I should write something to introduce myself. I work as a technician and part time teacher in automotive electronics at an upper secondary school in Sweden. As I am a humble guy I would not even think of to call myself an expert whe...

Hi!

On request: psdata file on the "high output voltage MAF" which resulted in a high reading - no less than 200g/s - at idle


https://mega.nz/#!wAFRlRIQ!GrdWt-92r4Uw ... jk1cN-QICs

Regards
Bjorn

RYM6746 Yes, I did all that and wrote "gnd test 30mV" in remarks on the screen shoot as well. I can say, regarding the output pin in the MAF connector, that there was only a tiny spike on the scope when priming took place, but nothing more. Yes, this engine really needs a MAF. Thanks for helping RYM...

Kim

That would be a hell of an engine to suck 240g/s at idle! So from now, I am the leader in the competition "highest voltage at MAF signal output". Thanks Kim for all the help!

Regards
Bjorn

Of course Technician! I will, but I post the psdata files tomorrow because they are in my computer at work

So ... here is the outcome of my MAF testing. Picture speaks by itself.

Regards
Bjorn

Very nice write up Kim, interesting reading and excellent job done!! I will, as I wrote earlier, hook up the scope, so lets see what findings I get. Absolutely that was indeed high signal from your MAF :lol: However, a fully functional MAF will stay well below the 5 volt supply - its headroom so to ...

Hi Technician! Long time no see! No, have not tried any of what you wrote, but I will keep those suggestions in mind for the future. Why I did not, well ... I was thinking that a dirty MAF would not give high air mass readings and besides, it was rock steady at 240g/s at idle - how that could be wit...

Oh forgot to say that these figures are at idle. Should be, as I read somwhere, in the vicinity of 2-4g/s.

Kim, since the readings is, and constant, over 240g/s I would bet on internal fault or wiring insulation. Headroom for the output on a working MAF would be no higher than 5 volts in theory. I will hook up my Pico tomorrow and save the file and upload it.

Regards Bjorn