Quote:
Originally Posted by robertsawh82
Sounds like a bad Mass Air Flow Sensor! Those are symptoms of that! Hesitation and stutters are two of those problems... Here is what you can do. Unplug your MAF sensor and if nothing happens there goes your problem. Two things, if your manipulating your maf sensor from your jb4 then figure out how to set it back to stock if you have a factory bmw maf. Or you sensor just went and you need a new one. Your MAF sensor is very vital to your engines performance! Your JB4 relies on that information from that sensor!
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Oh balls. I actually reconnect the stock MAF this past weekend. Issue is still there though. I thought the JB4 actually doesn't use the MAF with the ISO 5.3 update?