JB2 uninstall problem...PLEASE HELP!!!

yeefoo335 · 11-22-2008, 01:31 AM

Recently I installed the jb2 in my 335i sedan and i got a 'service engine soon code' and when i was driving i happened to give it a little gas, pretty much full acceleration, and the engine lost almost all power and began to run really rough, i then pulled over and turned off the car for a few minutes then began to drive again and went straight home. the next day i took out the jb2 and went to a mechanic that i know and he made the service engine light go away thinking everything was okay but one more day later (today) i was driving and the same thing happened again when i accelerated. so tomorrow im going to just take it in to bmw and see what they can do...only problem is will this void the warranty? will they be able to detect it? what could the problem be? so many questions i have just want to see what you guys think....

aut0sh0cker · 11-22-2008, 01:37 AM

what is the production date of your car? if it has the latest software you may be SOL

yeefoo335 · 11-22-2008, 01:39 AM

uhh not sure i ordered my car from bmw april 12 2008. will they still fix this problem if i take it in?

aut0sh0cker · 11-22-2008, 01:47 AM

I'm pretty sure the service rep will know that you had a modification done to your car, but depending on what the problem actually is, it may not matter. If you have a problem with the fuel pump (which is very common on this car) and it sounds like you do, it gets complicated...

aut0sh0cker · 11-22-2008, 01:48 AM

Quote:

Originally Posted by yeefoo335

uhh not sure i ordered my car from bmw april 12 2008. will they still fix this problem if i take it in?

Oh, and they will fix your problem, it is just a question of who will be taking up the bill...

yeefoo335 · 11-22-2008, 02:03 AM

do you think if its a wiring problem it will void the warranty? because im pretty sure thats what it is but dont know how that could effect the fuel pump. or if for example the hvac filter isnt put on exactly the way it was...

deletedelete · 11-22-2008, 02:12 AM

Only way to know how they will react is to take it in and see what happens. And only if the problem could be related to a chip will the warranty be voided. Anything not chip/ecu related will be fixed under warranty.

gt3fever · 11-22-2008, 02:32 AM

Remove JB2 before take your car in for service!!
otherwise they will blame everything on the tune.

hotrod182 · 11-22-2008, 07:13 AM

Did you reconnect the vacuum hose to the boost solenoid?

Sal@AUTOcouture · 11-22-2008, 07:27 AM

did you skip installing the last 2 wires as per the updated instructions?

cn555ic · 11-22-2008, 07:28 AM

why don't you take a deep breath and relax! Its okay the car is not going to blow up...Reinstall the JB2 and speak to Terry to diagnose the problem...I want to ask after un-installing the JB2 is the car still going into this limp mode? The check engine line if it does come on, a couple of times with the car on and off will eventually get rid of that service light...Don't get yourself all worked up...I was the same way when I first did the ECU tune...All those wires are pretty itimidating and once something goes kind of wrong, PANIAC stage, but with experience now I can tell u to try and relax!

rooster3.0 · 11-22-2008, 03:59 PM

Before you go to BMW, why don't you get the code read so there is no mystery? Or ask the mechanic what code it was that he cleared.

deletedelete · 11-22-2008, 04:04 PM

Doesn't autozone read the codes for free?

Terrance28 · 11-22-2008, 05:05 PM

Did you connect the blue and green looms? And did you bypass the boost sylenoid? Maybe you removed the jb2 and left the sylenoid bypassed? If you didn't connect the blue and green looms I don't think you tripped the code.

11-22-2008, 01:31 AM	#1
yeefoo335 Private First Class 33 Rep 101 Posts Drives: 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (1)	JB2 uninstall problem...PLEASE HELP!!! Recently I installed the jb2 in my 335i sedan and i got a 'service engine soon code' and when i was driving i happened to give it a little gas, pretty much full acceleration, and the engine lost almost all power and began to run really rough, i then pulled over and turned off the car for a few minutes then began to drive again and went straight home. the next day i took out the jb2 and went to a mechanic that i know and he made the service engine light go away thinking everything was okay but one more day later (today) i was driving and the same thing happened again when i accelerated. so tomorrow im going to just take it in to bmw and see what they can do...only problem is will this void the warranty? will they be able to detect it? what could the problem be? so many questions i have just want to see what you guys think....
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11-22-2008, 01:37 AM	#2
aut0sh0cker meh 123 Rep 1,756 Posts Drives: E92 335i, 997.2 C4S Join Date: Jan 2008 Location: 91362 iTrader: (2)	what is the production date of your car? if it has the latest software you may be SOL
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11-22-2008, 01:39 AM	#3
yeefoo335 Private First Class 33 Rep 101 Posts Drives: 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (1)	uhh not sure i ordered my car from bmw april 12 2008. will they still fix this problem if i take it in?
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11-22-2008, 01:47 AM	#4
aut0sh0cker meh 123 Rep 1,756 Posts Drives: E92 335i, 997.2 C4S Join Date: Jan 2008 Location: 91362 iTrader: (2)	I'm pretty sure the service rep will know that you had a modification done to your car, but depending on what the problem actually is, it may not matter. If you have a problem with the fuel pump (which is very common on this car) and it sounds like you do, it gets complicated...
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11-22-2008, 02:03 AM	#6
yeefoo335 Private First Class 33 Rep 101 Posts Drives: 335i Join Date: Nov 2008 Location: Los Angeles iTrader: (1)	do you think if its a wiring problem it will void the warranty? because im pretty sure thats what it is but dont know how that could effect the fuel pump. or if for example the hvac filter isnt put on exactly the way it was...
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11-22-2008, 02:12 AM	#7
deletedelete Major General 363 Rep 5,873 Posts Drives: m Join Date: Nov 2008 Location: usa iTrader: (14) Garage List 2013 e92 M3 [0.00] 2011 e93 M3 (sold) [0.00] 2009 335xi (sold) [0.00]	Only way to know how they will react is to take it in and see what happens. And only if the problem could be related to a chip will the warranty be voided. Anything not chip/ecu related will be fixed under warranty. __________________ ---> Click For xi/xDrive Suspension Compatibility List <---
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11-22-2008, 02:32 AM	#8
gt3fever Major 77 Rep 1,232 Posts Drives: 992 GT3, G87 Join Date: Oct 2008 Location: Socal, Taiwan iTrader: (15)	Remove JB2 before take your car in for service!! otherwise they will blame everything on the tune.
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11-22-2008, 07:13 AM	#9
hotrod182 . 813 Rep 3,974 Posts Drives: 2023 i4 M50 Join Date: Dec 2006 Location: California iTrader: (0)	Did you reconnect the vacuum hose to the boost solenoid? __________________ 2011 Alpine 335d M-Sport 12.34 @ 110.48mph 2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy)
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11-22-2008, 07:27 AM	#10
Sal@AUTOcouture 733 Rep 10,105 Posts Drives: E93 M3, E36 M3 Join Date: Feb 2007 Location: Sofla iTrader: (30)	did you skip installing the last 2 wires as per the updated instructions?
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11-22-2008, 07:28 AM	#11
cn555ic 441 Rep 18,331 Posts Drives: 335i Join Date: Jun 2007 Location: US iTrader: (6)	why don't you take a deep breath and relax! Its okay the car is not going to blow up...Reinstall the JB2 and speak to Terry to diagnose the problem...I want to ask after un-installing the JB2 is the car still going into this limp mode? The check engine line if it does come on, a couple of times with the car on and off will eventually get rid of that service light...Don't get yourself all worked up...I was the same way when I first did the ECU tune...All those wires are pretty itimidating and once something goes kind of wrong, PANIAC stage, but with experience now I can tell u to try and relax!
	Appreciate 0 Quote

11-22-2008, 03:59 PM	#12
rooster3.0 Major 27 Rep 1,306 Posts Drives: E92 335i Join Date: Nov 2006 Location: Jersey iTrader: (4)	Before you go to BMW, why don't you get the code read so there is no mystery? Or ask the mechanic what code it was that he cleared.
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11-22-2008, 04:04 PM	#13
deletedelete Major General 363 Rep 5,873 Posts Drives: m Join Date: Nov 2008 Location: usa iTrader: (14) Garage List 2013 e92 M3 [0.00] 2011 e93 M3 (sold) [0.00] 2009 335xi (sold) [0.00]	Doesn't autozone read the codes for free? __________________ ---> Click For xi/xDrive Suspension Compatibility List <---
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11-22-2008, 05:05 PM	#14
Terrance28 Brigadier General 109 Rep 3,334 Posts Drives: Crimson Red E92 Join Date: Nov 2007 Location: Killeen, TX iTrader: (17)	Did you connect the blue and green looms? And did you bypass the boost sylenoid? Maybe you removed the jb2 and left the sylenoid bypassed? If you didn't connect the blue and green looms I don't think you tripped the code. __________________ Mods list got too long, lets just say more than enough.
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