thought JB+ would be conservative, still got limp mode?!?

[bmw13]

With humidity around 94% daily, FL is very hot. After I allowed my car to warm up over the weekend i took a buddy for a ride and at the end of the pull went into limp mode. i went to my advanced auto parts and had it scanned, there were no soft or hard codes. i am still not too pleased that this happened,any thoughts, recommendations?

some ppl have recc. that i put the stock box back in until weather changes around hear.

others: get meth! or get FMIC!

at this point i would rather take any 'mod' money, and save up my next down payment, probably going to get out of this when m1 is out or maybe leftover e92 m3 in about a year or so. i feel like when it comes down to it, if you want to beat up on a car(really drive it) and you want it to perform consistently for importantly, get an ///M let me know your thoughts with the limp mode thanks guys

[Mike@N54Tuning.com]

Originally Posted by bmw13

With humidity around 94% daily, FL is very hot. After I allowed my car to warm up over the weekend i took a buddy for a ride and at the end of the pull went into limp mode. i went to my advanced auto parts and had it scanned, there were no soft or hard codes. i am still not too pleased that this happened,any thoughts, recommendations?

some ppl have recc. that i put the stock box back in until weather changes around hear.

others: get meth! or get FMIC!

at this point i would rather take any 'mod' money, and save up my next down payment, probably going to get out of this when m1 is out or maybe leftover e92 m3 in about a year or so. i feel like when it comes down to it, if you want to beat up on a car(really drive it) and you want it to perform consistently for importantly, get an ///M let me know your thoughts with the limp mode thanks guys

Sounds like a case of unrealistic expectations? The JB+ won't put a protective barrier around your car preventing the CEL from turning on. If you want that just unplug the light bulb in the dash. If you get a CEL it means something is wrong and you need to address it. Stock cars throw CELs all the time. First step is to read the code with a BT and determine what the problem is. Once you know that I can offer you advice on how to resolve it.

Mike

[Xaeryan]

Originally Posted by bmw13

With humidity around 94% daily, FL is very hot. After I allowed my car to warm up over the weekend i took a buddy for a ride and at the end of the pull went into limp mode. i went to my advanced auto parts and had it scanned, there were no soft or hard codes. i am still not too pleased that this happened,any thoughts, recommendations?

some ppl have recc. that i put the stock box back in until weather changes around hear.

others: get meth! or get FMIC!

at this point i would rather take any 'mod' money, and save up my next down payment, probably going to get out of this when m1 is out or maybe leftover e92 m3 in about a year or so. i feel like when it comes down to it, if you want to beat up on a car(really drive it) and you want it to perform consistently for importantly, get an ///M let me know your thoughts with the limp mode thanks guys

I'm not too surprised this happened considering stock 135/335 have gone into limp mode during track sessions (i.e. after hot temps/"beating" up on it).
You put a very affordable part on that adds quite a bit of power, so in hot temps...
Anyway, as Mike says, get it scanned with BT for more specific codes.
If you want to "beat up on it" lots and can't wait for the M1, pony up the extra cash for the BMW Performance Power kit which adds a (more) conservative tune and addresses the problem with the 135/335 - sufficient cooling.

[dunny]

What setting did you have the JB+ on? Default or higher?

[bmw13]

i have it set on 75%, and i was not expecting a "protective" anything, but maybe thought because i kept hearing how "BMW under-tuned these cars so much", that issues would not arise.
i had it scanned the next day and there were no codes pending, soft nor hard. just something i am not to thrilled about happening.

[dunny]

That sucks because I had the same thoughts about the JB+....was hoping it was conservative enough to not throw any codes so I can just run a few more lbs of boost for the time being.

It seems like (this is a guess) it is just a MAP clamp that tricks the ECU into reading lower boost numbers anyways, so I wonder if enough fuel is provided to support the extra boost without doing anything else? Most likely there is since 9/10 turbo cars run rich from the factory. I know hundreds of JB+ units have been used/sold without many complaints, but I like to understand what the part is doing before I install it and there isn't any info on the BMS site (other than stating that it raises boost).

[bluemoon]

What was your oil temp when it went into limp mode? High coolant temp may also be the problem. Unfortunately, BMW doesn't think a coolant gauge is worthwhile in monitoring temp.

[bmw13]

Originally Posted by bluemoon

What was your oil temp when it went into limp mode? High coolant temp may also be the problem. Unfortunately, BMW doesn't think a coolant gauge is worthwhile in monitoring temp.

oil temp was normal, just blow 250.very funny that you bring this up, my coolant light came on around 7.500 and i haven't refilled it since.

i have 18.000 now, something must not be right there. i have only had the tune since 16.500 mls. kind of odd that i am almost have gone almost twice as long before refilling coolant for the second time.

when the light came on i was an hour away from home and found myself going to an advanced auto parts and putting a non BMW coolant/ anti-freeze in the car. i will go to m dealer and grab a bottle later on and see if that helps at all

based on the oil temps reading fine before the light came on, i have a feeling this can be helped, but not solved by a fresh oil change and some new coolant.

[luv135i]

Originally Posted by bmw13

i have it set on 75%, and i was not expecting a "protective" anything, but maybe thought because i kept hearing how "BMW under-tuned these cars so much", that issues would not arise.
i had it scanned the next day and there were no codes pending, soft nor hard. just something i am not to thrilled about happening.

Did you use the BT scan or just the autozone OBD2?

[mineo77]

I recommend sending Terry an email and I am sure he can answer this without all of us speculating on what could be the problem.

[Mike@N54Tuning.com]

Originally Posted by dunny

That sucks because I had the same thoughts about the JB+....was hoping it was conservative enough to not throw any codes so I can just run a few more lbs of boost for the time being.

It seems like (this is a guess) it is just a MAP clamp that tricks the ECU into reading lower boost numbers anyways, so I wonder if enough fuel is provided to support the extra boost without doing anything else? Most likely there is since 9/10 turbo cars run rich from the factory. I know hundreds of JB+ units have been used/sold without many complaints, but I like to understand what the part is doing before I install it and there isn't any info on the BMS site (other than stating that it raises boost).

The fueling system is closed loop with wideband sensors. You get the same air/fuel ratio with the JB+ on as you do stock. The JB3 on the other hand remaps the ratios for its more aggressive boost curves.

Mike

[dunny]

Originally Posted by Mike@N54Tuning.com

The fueling system is closed loop with wideband sensors. You get the same air/fuel ratio with the JB+ on as you do stock. The JB3 on the other hand remaps the ratios for its more aggressive boost curves.

Mike

That makes sense to me. Thanks for the explanation. So to me that says that anything over 12-13psi of boost requires more fuel than what the stock ECU is capable of correcting/adding. Is that a reasonable observation?

[Mike@N54Tuning.com]

Originally Posted by dunny

That makes sense to me. Thanks for the explanation. So to me that says that anything over 12-13psi of boost requires more fuel than what the stock ECU is capable of correcting/adding. Is that a reasonable observation?

Right, for more than say 12psi the full fuel remapping (air/fuel ratio and fuel pressure) is required for optimal power and safety.

Mike

[BahamaBart]

I live in Florida and run JB+ at default. Have I had a few problems? Yes, but not because of the JB+. The engine itself has some problems. I believe I'm headed towards HPFP failure.
BT arrived today so with that I will be going to 100%.

[bmw13]

Originally Posted by luv135i

Did you use the BT scan or just the autozone OBD2?

OBDII scan tool... is that a problem?

[1speedbike]

Stock cars get limp mode too..

I run a JB+ at around 80% and haven't gotten a single tamper/fault code from the JB+

I've had 2 HPFP's fail, and both times the car went into limp mode from the fuel pump failure, and not from the chip or from overheating. I checked the codes to back this up, and sure enough all of the codes were on the same days around the same time.

[stevenc]

Originally Posted by bmw13

OBDII scan tool... is that a problem?

ODB scan tools only read basic emission problems, will not read the hidden bmw codes. Go to the regional boards and find someone with a BT scan tool and have them read your code for you.

Steven

[Angry3]

Originally Posted by stevenc

ODB scan tools only read basic emission problems, will not read the hidden bmw codes. Go to the regional boards and find someone with a BT scan tool and have them read your code for you.

Steven

Exactly. Autozones scan tool isn't going to read BMW specific fault codes. IMHO anyone running tuned without a way to read and clear codes is insane in the membrane

[jojo135]

Originally Posted by stevenc

ODB scan tools only read basic emission problems, will not read the hidden bmw codes. Go to the regional boards and find someone with a BT scan tool and have them read your code for you.

Steven

He is right. I have both the bt scanner and the obdll scanner from autozone and the bt scanner is what you need. Bt will tell you the data you need to know. My advice is to buy a bt scanner if you are going to tune your car period. Also, if you are running at 75 percent on the jb+ and you went into limp, I would bet $$ you have thrown codes. Possible tune codes also. What octane fuel were you running?

[BahamaBart]

Got BT Scanner and loaded it up yesterday and sent my finding to Burger. A bunch of codes thrown - 1 specifically on HPFP problems and a bunch about mis-fires. The car was at the dealer 3 times in the last 6 months with mis-fire issues. All BMW did was replace plugs, move injectors around and reflash to activate my FP when I open my car door. NOW, I am informed. Monday I will be dropping the car off and BMW and I are going to have a little talk.

Long live Burger, JB+ and the scan tool.

[Nicky G]

Do you guys remove your JB+ before taking the car to the dealer with issues? I should be installing my JB+ soon, maybe even tonight, and I'm curious how much I need to "hide it" from the dealers...

[bryce]

Originally Posted by Nicky G

Do you guys remove your JB+ before taking the car to the dealer with issues? I should be installing my JB+ soon, maybe even tonight, and I'm curious how much I need to "hide it" from the dealers...

yes, definitely take it off. there have been service bulletins notifying dealers to inspect the TMAP sensor, and your warranty would be in danger should they find a jb+ or sst. it takes all of 10 mins or so once you get the hang of it, just remove it for any dealer visits.