My M3 is Misfiring

[naseem80]

^^ Very unlikely..

I have to suspect that it's due from leaving the car idle for too long. I strongly suggest that you swap the MAF sensor with another one and see how it runs with it. They go bust easily if left unoperational for a while.

What is the MAF sensor?

[SSense]

What is the MAF sensor?

Mass Air Flow sensor :read:

[alquazi]

What is the MAF sensor?

Don't ever buy another part or do anything to your car before you consult this forum

MAF= Mass Air sensors

[mahmoud_bedewi]

but why MAF does so in second gear only ?

[alquazi]

but why MAF does so in second gear only ?

+1

I think it's fuel related

[mahmoud_bedewi]

a question is
is it related to 2nd gear ?
or related to 5-7 rpm range
i mean does it happen with 2nd gear only or happens in all gears around 5-7 rpm?

[Ayham]

^^ That was a question I asked. Need to know if it's in all gears or not.

Fuel should be out of the question since he's replaced his fuel pump. Left is the fuel filter and injectors; unlikely it's them.

[Ayham]

I was thinking about your issue on my home tonight and I remember that the same problem happened to me in the E36 328 some 2 years ago; Camshaft Position Sensor and/or Crankshaft Position Snesor.

It can't be anything outside these three sensors (including the MAF).

[Shak]

Hi guy's
We can all keep guessing untill the cows come home,Pop into the "X" Centre and I will tell you the cause of the missfire by my GT1 or my carsoft laptop?
Free diagnostic check for you matey!!!!!!

[Bruno]

if it was any of the sensors an error code should be thrown somehow

[Shak]

An ERROR code would show up if any of the info senors were faulty but a faulty MAF senor would not show up.

[Ayham]

^ +1....

The problem with misfire codes is that they don't tell you what's causing the misfire. So let's pray a faulty sensor code would show up.

Please keep us posted..

[samer110]

Take the car for a nice AbuDhabi route highway run, so if theres any carbon build up u can clear out all the crap. I realize sometimes when I park my car for a week or so it doesnt run as great when I start driving it again, usually takes a day or so to run normal again...

[alquazi]

Hi guy's
We can all keep guessing untill the cows come home,Pop into the "X" Centre and I will tell you the cause of the missfire by my GT1 or my carsoft laptop?
Free diagnostic check for you matey!!!!!!

Shak to the rescue:bmwflag:"We need a superhero smily"

[alquazi]

Take the car for a nice AbuDhabi route highway run, so if theres any carbon build up u can clear out all the crap. I realize sometimes when I park my car for a week or so it doesnt run as great when I start driving it again, usually takes a day or so to run normal again...

I don't think you get carbon buildup parking your car for a long period of time. But +1 for a good highway blast every now and then to clean it out.