M20 AFM to M30 AFM with 19lb injector questions

[kamotors]

update, my car runs and idles very good now, i tightened the wheel one notch just to smooth things out a little(which is still 1 notch looser than stock), throttle response is perfect, no bogging at all it just revs as soon as i touch the throttle, the car pulls amazing uphill(no other car i've EVER driven can go up mt. rose highway on cruise control with out downshifting),i only get the occasional check engine light with the 1222 code. My car has the mark d chip. only problem with this upgrade is if you unhook the ECU, it has to relearn,(which takes around 5 starts, and 50miles worth of driving to get it perfect.)

[Kingb]

I can't either but my car is euro spec. i don't know if it is only for us cars

[robmespeedy]

I have heard that the 027 without the 19#er's will make it run lean. I have a euro spec 325i and I do'nt think I have a check engine light. I have a check panel but that is only for the oil, coolant lights and stuff like that. I can't even do the fuel pedal stomp methat to check for codes

for some reason i cant do the fuel pedal stomp method to check for codes myself. dont know whats the hells wrong with my car.

[Kingb]

My car is running good with the 027 m30 afm. i havent intalled the 19#'ers yet.
my check engine light was coming on more frequently. now it rarely comes on.

I have heard that the 027 without the 19#er's will make it run lean. I have a euro spec 325i and I do'nt think I have a check engine light. I have a check panel but that is only for the oil, coolant lights and stuff like that. I can't even do the fuel pedal stomp methat to check for codes

[robmespeedy]

My car is running good with the 027 m30 afm. i havent intalled the 19#'ers yet.
my check engine light was coming on more frequently. now it rarely comes on.

[Kingb]

Ok so its been a month since i did this install with a 027. My car sill doesn't idle that good and if i am at a low RPM in a gear like 3rd at 1,000 RPM it surges and I have to down shift, it will run smooth at a higher RPM though. Most of my driving is at 30 KPM(18MPH) so it is bothersome.

[robmespeedy]

OK so I finally installed the '027' M30 AFM today. Idles like shit every time I start it, then smooths out after 30 seconds or so. Plugged the M20 AFM back in, runs fine. What gives? I let it idle for about 30 minutes after installing the M30 AFM, and then drove it to work and back to give it a good workout. Is there something I'm missing?

your not the only one! same here! just installed it yesterday.
i think once i install the 19# injectors it will be fine.

am i right?

[Kingb]

My car idles like shit with the 027 AFM, and I've swapped out 3 different ones. Maybe my car just doesn't like it :(

I noticed mine does idle a litle rough. But it screams when floored. I did the swap 3 days ago so I will give it more time. Plus my friends don't notice but they only know how to start a car and drive it.

[TS87325IS]

I had a 1222 code with mine when I first got it in and an occasional check engine light , my problem was a leak between the throttle body and afm causing un metered air in the system , once that was solved , to get it to Idle correctly , I had to adjust the wheel , but I am also running stock injectors and it pulls alot harder . there is a very good write up from a bmw repair shop that goes in detail about adjusting this afm and recalibrating it , I can't seem to locate the link , but it was right on and I am also running an 027 . You can pull it up on google if you type in " adjusting m30 afm" I am pretty computer illiterate so I don't know how to post the link. But the gist of it is to accuratly adjust the afm , you do it with the reading you get from the o2 sensor with a multimeter.

[kamotors]

My car idles like shit with the 027 AFM, and I've swapped out 3 different ones. Maybe my car just doesn't like it :(

mine did too, i had to drive with it for about a week, for it to go away.

[CorvallisBMW]

My car idles like shit with the 027 AFM, and I've swapped out 3 different ones. Maybe my car just doesn't like it :(

[Kingb]

I just installed th design 3's and a 027 AFM. I didn't think that the injectors were seated right so I messed with it for a while, they were right but I tried putting the injectors in first then the fuel rail. Didn't work I had to put them on the rail first then put them in.
Car started first turn and I drove full throttle almost all the way home. I have never heard that sound out of an E30. Maybe cause I actually bought a K&N this time and not a $10 ebay cone.
I am on my way to the junk yard to pick up the other 027 for $20 in case I ever need it for another swap.

[Kingb]

what cars did the 027 come on. i went through the junk yard searched like 5 5 series and found most striped of the afm and boot one with an m20 and another with the 016 afm

I got mine off a 530i and ut to get one off a 535i. You want a M30 motor so don't look at a 525i.

[nando]

Motronic only has one variable to adjust the amount of fuel up and down globally - that means if it's changing the variable to get a good lambda at idle, it's going to affect the entire map, and vice versa. which is why the whole idea of "plug and play" M30 AFMs is so stupid.

[kamotors]

wierd... I did a few 0-60 runs after the computer was fully adjusted and they were all really good, but after i reset the computer and then went to do 0-60 runs the car ran waaaaay faster is spun the tires on take off even though it could barely idle and the check engine light would sometimes come on, but then after it adapts and idles perfect it runs not as fast. does the car de-tune itself after the computer relearns the 19lb injectors and AFM?