[MurderedBeemer]

Ok so I've been getting this misfire of something.. When I go WOT with the jb4 turned on "Only", the car hesitates and backfires like crazy, engine light goes on but leaves after a couple of seconds, or if I hit a red light it starts shaking, so I shut off the engine and restart it and then everything is fine. Ok so I called the dealer and the guy that my friends recommended was fine about the jb4. So I brought it to him and since he can see through the key fob whats wrong with it, he didn't see anything. He brought the mechanic in and he plugged in his machine and took it around the street. No misfires or codes. So he told me that it wouldn't be injectors because he would get the code on his screen.. I'm lost now and it's been a while that my car has been doing this. Any help? I know I need to get the wire for jb4 to see if it throws any codes, but does anyone have an idea?

[MurderedBeemer]

No help anyone???

[menewtobmw]

Until you pull codes and post them, there is not a thing we can really do, unfortunately.

[MurderedBeemer]

Originally Posted by menewtobmw

Until you pull codes and post them, there is not a thing we can really do, unfortunately.

Alright thanks man, i'll be ordering the usb cable tomorrow. I tried reading codes from dash but there aren't any codes!

[fun2drive]

There is a bigger body of expertise at the site exclusively dedicated to boosted cars.
You will find entire threads on various aspects of tuners such as JB, Cobb, Vishnu, AA, etc.
You might try that site. I can't post it but it has:
bimmer
boost
Our forum is a great general forum but this one caters to the boosted cars.
Expect to be overwhelmed with information and you might well find another poster that has described the same problem you have...

[skatenc123]

make sure you have auto clear off. but sounds like misfires. id start with spark plugs. if that doesnt work coilpacks. theres a stcky on this under the tune section also.

[MurderedBeemer]

Originally Posted by skatenc123

make sure you have auto clear off. but sounds like misfires. id start with spark plugs. if that doesnt work coilpacks. theres a stcky on this under the tune section also.

Yea I disabled the auto clear. Even the dealer said that he can only change my spark plugs in 15,000kms which is basically when the lease is up lol. I've been reading other posts and it seems to either be spark plugs or coils. Thanks man!