is there a jb4 specialist in MA?

fireman02169 · 05-20-2015, 06:15 AM

Looking for a shop in mass that knows jb4. Having trouble with misfires and limp mode. Car runs fine in map0. TIA

zero2sixtyZ · 05-20-2015, 07:08 AM

Did you pull the codes?

fireman02169 · 05-20-2015, 07:32 AM

Yup, misfires.
I dont have a laptop so i cant get a datalog to send terry
cylinder 6 code 2-9-D-2, i just did a few pulls with no problems when the engine is cold, but as soon as i got up to temp it errors.

zero2sixtyZ · 05-20-2015, 09:10 AM

Replace sparks and coils recently?

fireman02169 · 05-20-2015, 11:07 AM

New plugs, next step will be to swap coils...but i dont expect that will do anything. It runs fine in map0 WOT, and map1 WOT until it gets up to operating temp.
had my intake cleaned yesterday. Hpfp and lpfp have been changed 40k miles ago.
hopefully its not a bad injector. Would engine temp affect the injector performance?

fireman02169 · 05-20-2015, 05:35 PM

Actually, i was just informed that the jb wont increase boost until it detects the engine is up to temp, via oil temperatures. Time to swap that coil pack

wahooooman · 05-22-2015, 09:01 AM

do you run any e85 ?, origianl plugs and coills ?,
my last e90 went through plugs coils and 2 injectors both were stuck open. If you do get plugs try ones you have to gap. Then gap them based on your boost. !
good luck

fireman02169 · 05-25-2015, 04:28 PM

So, i swapped coil pack 6 with 1 and im still getting missfire cyl 6 (29d2) and i also got misfiring in case of tank filling level too low (29d9)

05-20-2015, 06:15 AM	#1
fireman02169 Private 3 Rep 58 Posts Drives: 2009 335i xdrive Join Date: Aug 2013 Location: Pembroke, MA iTrader: (0)	is there a jb4 specialist in MA? Looking for a shop in mass that knows jb4. Having trouble with misfires and limp mode. Car runs fine in map0. TIA Last edited by fireman02169; 05-20-2015 at 05:41 PM..
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05-20-2015, 07:08 AM	#2
zero2sixtyZ Colonel 953 Rep 2,678 Posts Drives: e92 + f15 Join Date: Jan 2012 Location: Cambridge, MA iTrader: (4) Garage List 2007 335i Coupe [9.50] 2015 X5 xdrive50i [10.00]	Did you pull the codes?
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05-20-2015, 07:32 AM	#3
fireman02169 Private 3 Rep 58 Posts Drives: 2009 335i xdrive Join Date: Aug 2013 Location: Pembroke, MA iTrader: (0)	Yup, misfires. I dont have a laptop so i cant get a datalog to send terry cylinder 6 code 2-9-D-2, i just did a few pulls with no problems when the engine is cold, but as soon as i got up to temp it errors. Last edited by fireman02169; 05-20-2015 at 08:56 AM..
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05-20-2015, 09:10 AM	#4
zero2sixtyZ Colonel 953 Rep 2,678 Posts Drives: e92 + f15 Join Date: Jan 2012 Location: Cambridge, MA iTrader: (4) Garage List 2007 335i Coupe [9.50] 2015 X5 xdrive50i [10.00]	Replace sparks and coils recently?
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05-20-2015, 11:07 AM	#5
fireman02169 Private 3 Rep 58 Posts Drives: 2009 335i xdrive Join Date: Aug 2013 Location: Pembroke, MA iTrader: (0)	New plugs, next step will be to swap coils...but i dont expect that will do anything. It runs fine in map0 WOT, and map1 WOT until it gets up to operating temp. had my intake cleaned yesterday. Hpfp and lpfp have been changed 40k miles ago. hopefully its not a bad injector. Would engine temp affect the injector performance?
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05-20-2015, 05:35 PM	#6
fireman02169 Private 3 Rep 58 Posts Drives: 2009 335i xdrive Join Date: Aug 2013 Location: Pembroke, MA iTrader: (0)	Actually, i was just informed that the jb wont increase boost until it detects the engine is up to temp, via oil temperatures. Time to swap that coil pack
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05-22-2015, 09:01 AM	#7
wahooooman Lieutenant 66 Rep 507 Posts Drives: 2010 Atlantis M3 Join Date: May 2011 Location: NORTH SHORE Ma iTrader: (4)	do you run any e85 ?, origianl plugs and coills ?, my last e90 went through plugs coils and 2 injectors both were stuck open. If you do get plugs try ones you have to gap. Then gap them based on your boost. ! good luck __________________ 07 e90 335xi- Sold, 09 X5- Sold, 12 e92 335 xdrive - Sold 11 e92 M3- Sold, 15 M235-Sold,07 e90 335xi (current daily), 10 Atlantis e92 M3 (current) Way to many mods to list
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05-25-2015, 04:28 PM	#8
fireman02169 Private 3 Rep 58 Posts Drives: 2009 335i xdrive Join Date: Aug 2013 Location: Pembroke, MA iTrader: (0)	So, i swapped coil pack 6 with 1 and im still getting missfire cyl 6 (29d2) and i also got misfiring in case of tank filling level too low (29d9)
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