mass air flow wiper

[gone002]

has anyone ever adjusted the wiper?

these are my symptoms...
new 2.5" straight ss exhaust and new header
84 m10

1. car idles at 2k
2. icu is backed all the way out
3. car runs mad rich
4. when i push the wiper idle slows down
(the po opened the black cover leads me to believe it has been tampered with)

im thinkin if wind the icu in to half way and adjust the wiper i could get a better power band to match the free flow exhaust.

any thoughts or expriences?

[Adrian_Visser]

Some people do this when installing the 027 m30 afm on m20's. I tried it just to see what happens. It can make your car run like a total bag of shit at idle I'll tell you that. Wouldn't recommend it myself. If it has already been fucked with it would be worth trying to get it back to original. Search for the m30 afm swap I can't remember off the top of my head which way to turn the wheel to lean out the mixture.

[badvibrations]

http://e28-535i.com/technical/AFM%20Repair.pdf

Read the whole article but pages 10 and 11 should be of most interest to you.

IIRC this article says not to adjust the coil return spring, as it is "laser calibrated from the factory' or something.
But IMHO as long as you mark/scribe where it was initially, play with it as much as you want to get the best out of what you want from your car. Dont expect a whole lot from messing with it as the best thing to do is to get a new/better/re-manufactured one.

Hope this helps.

[badvibrations]

I can't remember off the top of my head which way to turn the wheel to lean out the mixture.

To lean out the mixture you want the door to remain on the more closed side when air is flowing through.
As the further open the door is, the more fuel is added.

[gone002]

awesome info guys
in one day i think i figured it out with your help

does anyone sell the printed board alone?
id love to replace it

[badvibrations]

awesome info guys
in one day i think i figured it out with your help

does anyone sell the printed board alone?
id love to replace it

That, I highly doubt.

I know that you can buy a re-manufactured one but what they do to reman it is a mystery to me.
Maybe try and get ahold of who ever does the rebuild and ask them what they do and where to source parts.

[rustybullet]

i have adjusted mine. but what you have there is a "air flow meter" not a mass air flow sensor.

adjustments. i would only adjust to 5 teeth max either way. start with two and keep going.
counter clockwise= rich
clockwise =lean

[mikeedler]

you really shouldnt touch it at all. It will not make your car faster.

your car runs like crap for another reason. find the real fault and fix that rather than adjusting everything in a very crappy non precise way to compensate for other problems.

[gone002]

you really shouldnt touch it at all. It will not make your car faster.

your car runs like crap for another reason. find the real fault and fix that rather than adjusting everything in a very crappy non precise way to compensate for other problems.

there is allways some brainiac with some dumb ass coment on this site....

car runs fine
im not looking to make it "faster"

more air is going into and out of the engine...ecu is over compensating
if this unit was not ment to be adjusted ...there would be no adjustment screw. hello!!!!!

if the car was bone stock ...you would be right ....but it is not..you are wrong
please have a nice life and find another thread to flame...

thank for your time to every one with positive and helpful comments
i have learned alot and will report back with my results

[gone002]

http://e28-535i.com/technical/AFM%20Repair.pdf



IIRC this article says not to adjust the coil return spring, as it is "laser calibrated from the factory'

Hope this helps.

oh yeah i think what they are refering to in that the resistors have been tuned by a laser.. which in 1984 was a BIG deal. lasers cost thousands of dollars then . now they give them away as key chains.

i showed the part to the laser guy (who is also our electronic engineer) at my job today and he said he could remake one minus the carbon resistor...


badvibes you rock thanks again!!!

PCB's (printed circuit boards) are so easy to make these days...i just gota find someone to do the resitor and ill make a new one

the article says to carefully bend the wiper to a new portion of the resistor

i found another good link on roadfly ill have to post it here...

[badvibrations]

Just an FYI,
I wouldn't take much that mikeedler says as a 'dumbass comment'

Dood really knows his shit.

[mikeedler]

seeing as how I am a tech here in Germany I seem to feel I do know a LITTLE bit about BMWs---M10s are a bit under the point of what I work on everyday-- but yeah-- you dumb fucks all know everything!

there is no amount of "tuning" you did to your engine that would not allow it to idle correctly with the stock components.

but yeah fuck yourself and your wopping 2.5 inch racing engine exhaust-- one day you stupid fucking ignorant bastards will figure life out-- and this thread is why I stopped trying to help retards like you out and just kept to the off topic section.
tschuess

[gone002]

Just an FYI,
I wouldn't take much that mikeedler says as a 'dumbass comment'

Dood really knows his shit.

granted he may "know his shit"
i dont know dude...
but his tact sucks! that i do know
i do know he does not know my car
or that fact that the po dicked w the unit


either way i have been though the whole engine
and i am pretty sure this will solve my problem

let me rephrase that for him...
- " good sir, you might consider looking for other areas of concern before adjust the afm"


but what evers i got the info i needed
im looking into replacing the unit with a microcontroller. the whole wiper system seems so dated.
i just gota do some more research

[gone002]

seeing as how I am a tech here in Germany I seem to feel I do know a LITTLE bit about BMWs---M10s are a bit under the point of what I work on everyday-- but yeah-- you dumb fucks all know everything!

there is no amount of "tuning" you did to your engine that would not allow it to idle correctly with the stock components.

but yeah fuck yourself and your wopping 2.5 inch racing engine exhaust-- one day you stupid fucking ignorant bastards will figure life out-- and this thread is why I stopped trying to help retards like you out and just kept to the off topic section.
tschuess

oh so nice!
that made me smile! =)
that was done w such style!!!!! (i really mean that!)


oh yeah i might not be a german tech...but i have been dicking with an m10 since 1986. i love these lil motors!!!

and now that the flaming is over can we get back to tech talk!!!!

and btw it's
tschuss not tschuess

tschussi .... =)

[gone002]

finally got it done
the key is tiny tiny adjustments!!!
got play with the icv too...
but the two together leaned out my mix and gives the car more pull

ive got a a/f ratio gage that i made going in next...

sum total ...its really not voodoo!!!