[jmwilson125]

Currently running the jb4 with a maf delete on my m235i. It makes the car run much more smoothly with the aftermarket intake.

My question is, if I turn the jb4 on map zero or uninstall it, then should I plug the mad back in? Will airflow not be properly monitored if I do not?

[Shayan55]

Originally Posted by jmwilson125

Currently running the jb4 with a maf delete on my m235i. It makes the car run much more smoothly with the aftermarket intake.

My question is, if I turn the jb4 on map zero or uninstall it, then should I plug the mad back in? Will airflow not be properly monitored if I do not?

Im pretty sure if you uninstall your jb4 the maf should be back in place

[Dylan86]

On the contrary, can you just leave the MAF plugged in with the factory plug itself? That way if you do revert to map "0" or uninstall the unit, you won't "forget"? Or will it enable MAF on the JB4, if it's plugged in?

Just getting my feet wet as I prepare to install mine come spring

Thanks

[jmwilson125]

Originally Posted by Dylan86

On the contrary, can you just leave the MAF plugged in with the factory plug itself? That way if you do revert to map "0" or uninstall the unit, you won't "forget"? Or will it enable MAF on the JB4, if it's plugged in?

Just getting my feet wet as I prepare to install mine come spring

Thanks

If I plug it back in it doesn't run as well. I won't forget I was just curious. I posted the same thing on 54tech and the guys there said I should have nothing to worry about.

I would imagine there has to be some sort of fail safe. If your maf ever went when you were driving on the highway it would need some sort of fail safe so you could run the car until it was safe to pull over.

I remember the maf went one time on my father's pathfinder. Basically cut most/all power and I had to pull over.