[streetz65]

I have a 14 335i m sport sport auto and the car is FBO. When I install the injen intake on the car the car shifts hard and is kinda jumpy. When I install the factory intake no issues. Does anyone know how to fix this? I was going to sell the intake but don't want to until I understand what's going on.

[mbanks21]

Unplug the MAF sensor. I had issues with it plugged in, unplugged it and runs like a dream now

I have the Injen intake as well

[streetz65]

Won't this affect the car in some ways tho?

[mbanks21]

Originally Posted by streetz65

Won't this affect the car in some ways tho?

Nope. I had my mechanic looking at boost leaks and JB4 settings and I was getting super pissed the car ran like crap. Then he sends me a message "hey try unplugging the MAF sensor". I did and it solved all my issues. You'll get the error code on the JB4 but no CELs. I've had it unplugged for about 2 months now, no issues at all.

[odus]

interesting that and how cold are all the fluids I find it shifts hard when temps are low and the weather gets colder outside.

[streetz65]

Originally Posted by odus

interesting that and how cold are all the fluids I find it shifts hard when temps are low and the weather gets colder outside.

Even with th car fully warmed up and fluids are perfect just got down at the dealer. Still would shift hard and be jumpy. Since unplugging the map sensor no issues tho

[streetz65]

Originally Posted by mbanks21

Nope. I had my mechanic looking at boost leaks and JB4 settings and I was getting super pissed the car ran like crap. Then he sends me a message "hey try unplugging the MAF sensor". I did and it solved all my issues. You'll get the error code on the JB4 but no CELs. I've had it unplugged for about 2 months now, no issues at all.

Unplugged the sensor and car runs like it should. Is there going to be any long term issues with unplugging the sensor tho?

[Buckeyes]

Maybe tape up the sensor plug to keep dirt out.

[Buckeyes]

Maybe tape up the sensor plug to keep dirt out.

[Lego864]

Didn't realize we could run off of the MAP alone (speed density), so looked into it a little more and ran across this thread:

http://www.n54tech.com/forums/showthread.php?t=35580

Terry from BMS and Peter from PURE/PTF say it's okay and don't think they would steer us astray.

Sounds like if you are running a jb4 and aftermarket intake then un-plugging the MAF is the way to go for a smoother running car at low throttle/idle.

[2013_Estoril_335i]

Originally Posted by mbanks21

Unplug the MAF sensor. I had issues with it plugged in, unplugged it and runs like a dream now

I have the Injen intake as well

+1. My Injen had the same problem. I unplugged the MAF. Photo attached.

[streetz65]

Put about 1200miles on the car with it unplugged and it has been running great! Thank you guys for the help and responses

[Ejones4541]

Originally Posted by streetz65

I have a 14 335i m sport sport auto and the car is FBO. When I install the injen intake on the car the car shifts hard and is kinda jumpy. When I install the factory intake no issues. Does anyone know how to fix this? I was going to sell the intake but don't want to until I understand what's going on.

I noticed the same thing when I added my BMS intake and JB4...I thought it was due to the mapping.

I'll try unplugging the MAF and see what happens.