JB4 issues (no boost )

T-Dubbs · 08-28-2012, 10:42 AM

so ill start with some history
the car has been din an stage 2 for its entire life.
4 weeks ago, i upgraded to jb3, and the car ran like a dream!
loved the power.

then last week i ordered the jb4, i installed it properly, and the steering wheel controls worked perfectly. but however the car did not boost at all.
i thought it was pretty weird, so i took the jb4 out and the car ran perfectly on the dinan tuned ecu. i then got a CEL for waste gate actuator( 30CF) but the jb4 wasn't on the car ( but the car ran perfectly normal and boosted normally)
then last nite i tried the jb4 again in the car, and the same issues as before.
the steering wheel controls all worked fine, but NO boost at all( and yes i let the car warm up)
so i took it out once again and it was perfectly fine without the jb4.

has anyone had any sort of the same issues??
i really would like my jb4 to work, before i put in my downpipes.

but i think that the issue is the jb4, since the jb3 worked fine and without the jb4, the car ran perfectly fine.
the only time the car ran poorly was with jb4.......

any help??
im not really too sure on what i can do as of now.

JYohay · 08-28-2012, 02:14 PM

im assuming that you know how to change maps since you say "the steering wheel control works" but what map were you in?
did you get a engine power loss light, or you just "felt" no boost?
or do you have a boost gauge?

foghat · 08-28-2012, 04:23 PM

Did you buy the JB4 used? If so, maybe the previous owner had it set to map 8 (no turbos). Like JYohay asked, how do you know there was no boost? Did you turn the boost on fuel or temp on via the jb4?

Try change the maps around.

http://www.n54tech.com/forums/attach...1&d=1331422354

I would also head over to n54tech.com and ask there. I sure Terry will respond directly.

We'll have to get together once you get your dp's on. I'd like to see the difference they make.

T-Dubbs · 08-28-2012, 07:39 PM

i was always in map 5
and i bought the upgrade from n54tuning new.
i had the boost on fuel, and it never left 0, and the car was slow as hell

i emailed terry, with photos of my harness to see if it was possibly a wiring issue.
But i don't think i would be able to use the steering wheel controls if the wiring was incorrect.

but i do feel like it is software related, since the jb3 worked 100% perfectly, and i could boost normally when i took off the jb4

and i dont have the USB to data log the car

Suds · 08-28-2012, 09:02 PM

Do you have a way to data log your car, then you wiill know exactly what is going on, I use Dashcommand and my iPad with a cable connected to the obd2 port, and there are other options, just a suggestion.

Mike@N54Tuning.com · 08-29-2012, 10:41 AM

Do a datalog, but sounds like you blew off a chargepipe or have some active problem code stored.

Mike

T-Dubbs · 08-29-2012, 10:53 AM

if i blew off a charge pipe, the car wouldn't run very well without it, and its fine without the jb4.

I'm going to buy a usb cord today.

foghat · 08-31-2012, 08:42 AM

Quote:

Originally Posted by T-Dubbs

i was always in map 5
and i bought the upgrade from n54tuning new.
i had the boost on fuel, and it never left 0, and the car was slow as hell

i emailed terry, with photos of my harness to see if it was possibly a wiring issue.
But i don't think i would be able to use the steering wheel controls if the wiring was incorrect.

but i do feel like it is software related, since the jb3 worked 100% perfectly, and i could boost normally when i took off the jb4

and i dont have the USB to data log the car

Hmmm. Weird. I'd suggest it may still be worth your while posting this at n54tech.

T-Dubbs · 09-04-2012, 11:37 AM

ok so i was talking with terry and he suggested to cross the wastegate wires together on the harness, and it worked
the car is boosting the way it finally should!

couldnt be happier

foghat · 09-05-2012, 01:06 PM

Quote:

Originally Posted by T-Dubbs

ok so i was talking with terry and he suggested to cross the wastegate wires together on the harness, and it worked
the car is boosting the way it finally should!

couldnt be happier

Glad to hear it. Now get the dp's on and let me know how she goes.

T-Dubbs · 09-05-2012, 02:50 PM

downpipes going on the car tomorrow

ChristianReyess · 09-05-2012, 05:19 PM

Quote:

Originally Posted by T-Dubbs

downpipes going on the car tomorrow

I love the happy endings, just not the anxiety before that!

GSR187T · 05-18-2014, 10:44 AM

Quote:

Originally Posted by T-Dubbs

ok so i was talking with terry and he suggested to ross the wastegate wires together on the harnessc, and it worked
the car is boosting the way it finally should!

couldnt be happier

I'm having the same issues, what you mean by "cross the wastegate wires together on the harness"?

mike@x-ph.com · 05-18-2014, 01:38 PM

Quote:

Originally Posted by T-Dubbs

downpipes going on the car tomorrow

Nice

edisapimp · 05-18-2014, 02:36 PM

Thread from the dead.

mike@x-ph.com · 05-18-2014, 02:44 PM

Quote:

Originally Posted by edisapimp

Thread from the dead.

Oh WOW LOL
Did not realize how old this thread is until you replied.

jroach · 09-22-2019, 02:34 PM

hey all I know this thread has been dead for a while but hoping one of you guys would be able to help me out. I am having the same issues with no boost on my n54 335. My assumption is wastegates are stuck open due to the JB4.
what does it mean to cross the wastegate wires. I don't want to try the wrong thing and accidentally mess it up.

08-28-2012, 10:42 AM	#1
T-Dubbs Coal Troll 150 Rep 326 Posts Drives: '14 F10 535d Join Date: Apr 2012 Location: Calgary,AB/Palm Springs CA iTrader: (1)	JB4 issues (no boost ) so ill start with some history the car has been din an stage 2 for its entire life. 4 weeks ago, i upgraded to jb3, and the car ran like a dream! loved the power. then last week i ordered the jb4, i installed it properly, and the steering wheel controls worked perfectly. but however the car did not boost at all. i thought it was pretty weird, so i took the jb4 out and the car ran perfectly on the dinan tuned ecu. i then got a CEL for waste gate actuator( 30CF) but the jb4 wasn't on the car ( but the car ran perfectly normal and boosted normally) then last nite i tried the jb4 again in the car, and the same issues as before. the steering wheel controls all worked fine, but NO boost at all( and yes i let the car warm up) so i took it out once again and it was perfectly fine without the jb4. has anyone had any sort of the same issues?? i really would like my jb4 to work, before i put in my downpipes. but i think that the issue is the jb4, since the jb3 worked fine and without the jb4, the car ran perfectly fine. the only time the car ran poorly was with jb4....... any help?? im not really too sure on what i can do as of now. __________________ My hybrid burns Diesel & Oil deleted F10 535d
	Appreciate 0 Tweet Quote

08-28-2012, 02:14 PM	#2
JYohay Banned 42 Rep 2,009 Posts Drives: 2011 X5 Join Date: Mar 2012 Location: NY iTrader: (3)	im assuming that you know how to change maps since you say "the steering wheel control works" but what map were you in? did you get a engine power loss light, or you just "felt" no boost? or do you have a boost gauge?
	Appreciate 0 Quote

08-28-2012, 04:23 PM	#3
foghat Captain 58 Rep 913 Posts Drives: 2008 135i Join Date: Jun 2009 Location: Great White North iTrader: (1)	Did you buy the JB4 used? If so, maybe the previous owner had it set to map 8 (no turbos). Like JYohay asked, how do you know there was no boost? Did you turn the boost on fuel or temp on via the jb4? Try change the maps around. http://www.n54tech.com/forums/attach...1&d=1331422354 I would also head over to n54tech.com and ask there. I sure Terry will respond directly. We'll have to get together once you get your dp's on. I'd like to see the difference they make.
	Appreciate 0 Quote

08-28-2012, 07:39 PM	#4
T-Dubbs Coal Troll 150 Rep 326 Posts Drives: '14 F10 535d Join Date: Apr 2012 Location: Calgary,AB/Palm Springs CA iTrader: (1)	i was always in map 5 and i bought the upgrade from n54tuning new. i had the boost on fuel, and it never left 0, and the car was slow as hell i emailed terry, with photos of my harness to see if it was possibly a wiring issue. But i don't think i would be able to use the steering wheel controls if the wiring was incorrect. but i do feel like it is software related, since the jb3 worked 100% perfectly, and i could boost normally when i took off the jb4 and i dont have the USB to data log the car __________________ My hybrid burns Diesel & Oil deleted F10 535d Last edited by T-Dubbs; 08-28-2012 at 07:49 PM..
	Appreciate 0 Quote

08-28-2012, 09:02 PM	#5
Suds /M Enthusiast 1597 Rep 1,618 Posts Drives: Responsiblish Join Date: Aug 2010 Location: Lone Star State iTrader: (1)	Do you have a way to data log your car, then you wiill know exactly what is going on, I use Dashcommand and my iPad with a cable connected to the obd2 port, and there are other options, just a suggestion.
	Appreciate 0 Quote

08-29-2012, 10:41 AM	#6
Mike@N54Tuning.com Joint Chiefs of Staff 4911 Rep 115,980 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	Do a datalog, but sounds like you blew off a chargepipe or have some active problem code stored. Mike
	Appreciate 0 Quote

08-29-2012, 10:53 AM	#7
T-Dubbs Coal Troll 150 Rep 326 Posts Drives: '14 F10 535d Join Date: Apr 2012 Location: Calgary,AB/Palm Springs CA iTrader: (1)	if i blew off a charge pipe, the car wouldn't run very well without it, and its fine without the jb4. I'm going to buy a usb cord today. __________________ My hybrid burns Diesel & Oil deleted F10 535d
	Appreciate 0 Quote

09-04-2012, 11:37 AM	#9
T-Dubbs Coal Troll 150 Rep 326 Posts Drives: '14 F10 535d Join Date: Apr 2012 Location: Calgary,AB/Palm Springs CA iTrader: (1)	ok so i was talking with terry and he suggested to cross the wastegate wires together on the harness, and it worked the car is boosting the way it finally should! couldnt be happier __________________ My hybrid burns Diesel & Oil deleted F10 535d
	Appreciate 0 Quote

09-05-2012, 02:50 PM	#11
T-Dubbs Coal Troll 150 Rep 326 Posts Drives: '14 F10 535d Join Date: Apr 2012 Location: Calgary,AB/Palm Springs CA iTrader: (1)	downpipes going on the car tomorrow __________________ My hybrid burns Diesel & Oil deleted F10 535d
	Appreciate 0 Quote

05-18-2014, 02:36 PM	#15
edisapimp Civil Rights Activist 115 Rep 949 Posts Drives: E46 Sedan, E88 Vert Join Date: Apr 2013 Location: Long Island iTrader: (0)	Thread from the dead. __________________ E88 Crimson Red Vert MSport 6MT - Listing your mods in your signature is lame. BMS DCI/MHD E30 Flash!!/AA Sport FMIC/VRSF CP w Tial BOV/VRSF 3" DPs/550i clutch w SPEC SMFW/Apex EC-7s/Whiteline RSFB/E92 M3 FCAs/Bilstein B12 Pro Kit/VRSF inlets
	Appreciate 0 Quote

09-22-2019, 02:34 PM	#17
jroach Registered 0 Rep 1 Posts Drives: 2007 BMW 335i Join Date: Sep 2019 Location: College Park, MD iTrader: (0)	Having the same issues 5-7 years later hey all I know this thread has been dead for a while but hoping one of you guys would be able to help me out. I am having the same issues with no boost on my n54 335. My assumption is wastegates are stuck open due to the JB4. what does it mean to cross the wastegate wires. I don't want to try the wrong thing and accidentally mess it up.
	Appreciate 0 Quote