E30 318I M10B13 1984

[ClintD]

Hi Fans,

i need some help please with my BMW E30 318i M10B13 1984 2 door chrome bumper
The car did not want to start, so i tried changing a few air flow meters, fortunately it started with 1 of the afm's i tried but then it had a major miss when i was driving the car.

how do i go about solving this issue, is there any possible way i can get a new afm 1 from an exact model or from bosch/ bmw?

thanks very much

 

[Jeremy.d]

Hi Mate. Please do a proper into in the right section. Im sure the guys would love to see your car too.

As for your problem, I think if it started with one afm then try to get a second hand one from a scrap one or something. Afms can be set, but they are quite sensitive I understand, so make sure that you get someone who knows their stuff to set it for you.

 

[JayDrft]

The issue there is the carbon strip inside the square cover on the AFM - with acceleration over time it wears this strip out and doesn't make proper contact - it can be adjusted and fiddled with but it may make it better but may also make it worse.

My recommendation - toss the standard old school setup and go aftermarket fuel management. It gets rid of the AFm and works either off a Throttle position sensor or a vacuum line connected to your intake.

Trying to source a decent OEM part is going to be extremely challenging.

Just a question - you say you have the M10 motor, I stand to be corrected but weren't those carbed? Another thing to consider - if it is a M10 with fuel injection - something to check would be the crank sensor located below the crank pulley. This could also be faulty, if its faulty it wont give your ignition the right signal to fire. Either the sensor or AFM will give you hassles.

Hope it helps.

 

[Jeremy.d]

The issue there is the carbon strip inside the square cover on the AFM - with acceleration over time it wears this strip out and doesn't make proper contact - it can be adjusted and fiddled with but it may make it better but may also make it worse.

My recommendation - toss the standard old school setup and go aftermarket fuel management. It gets rid of the AFm and works either off a Throttle position sensor or a vacuum line connected to your intake.

Trying to source a decent OEM part is going to be extremely challenging.

Just a question - you say you have the M10 motor, I stand to be corrected but weren't those carbed? Another thing to consider - if it is a M10 with fuel injection - something to check would be the crank sensor located below the crank pulley. This could also be faulty, if its faulty it wont give your ignition the right signal to fire. Either the sensor or AFM will give you hassles.

Hope it helps.

Spot on about the carbon strip. The early m10 engines were carb, but i believe there were injected versions.
OEM is very hard to find. I think Management is his best option.