Need Advice Please: To keep or not to keep

izaazk · 08-31-2017, 05:02 PM

So for the past few months ive been having powertrain issues with my 12'335i.

I bought it 6 months ago for $20k out the door used with 45k miles on it!

I have every package they offered at the time except Msport...

----- Recently had installed jb4 and tmap ground was fried... ever since.. car runs like shit... low end power is completely gone (feels slow as shit)

I keep getting a check engine light for P112E code --> manifold pressure lower then throttle angle...

Ive been to 2 indy shops (1 said bad DME, 1 said need more time)

Dealer doesnt wana diagnose it because its "too modified"

Should i keep trying to fix it or trade it in...??

I cant find another 335 for 20-24k with similar packages and mileage :/

MaximusJ · 08-31-2017, 06:10 PM

I wouldnt sell a car that has a problem honestly. It will Massively affect the value and it could take some time to sell (and implying you driving it all this time). I would concentrate on fixing the issue; then decide if you should keep it or not.

mdai245 · 08-31-2017, 06:59 PM

"Had jb4 installed..."

Did you take back to the shop that did the install and ask them to fix it? It sounds like they broke it.

Based on posts I have seen regarding JB4 installs, its really easy to fry the DME if the install er doesnt know what they are doing.

jmg · 08-31-2017, 08:22 PM

Ouch, sorry to hear OP. Worst case scenario here:

http://f30.bimmerpost.com/forums/sho...6&postcount=26

maxdobe · 08-31-2017, 08:53 PM

Quote:

Originally Posted by jmg

Ouch, sorry to hear OP. Worst case scenario here:

http://f30.bimmerpost.com/forums/sho...6&postcount=26

So is it really true that anything else but MPPSK or Dinan is junk, as thread above implies ? I mean, besides mppsk, what OEM mod is out there to do for our 4 series m sports?? Nada. Nothing unless third party I've noticed.

izaazk · 08-31-2017, 09:35 PM

See i thought it was the DME in my situation too but the car ran fine for a long time after that fix...

recently (no changes by me) causes it to run super slow... but its Intermitent so its hard to identify the issue....

The indy's bmw scan tool said that the DME, throttle body, and EGS( I think) lose signal while im driving...

jmg · 08-31-2017, 09:47 PM

Quote:

Originally Posted by maxdobe

So is it really true that anything else but MPPSK or Dinan is junk, as thread above implies ? I mean, besides mppsk, what OEM mod is out there to do for our 4 series m sports?? Nada. Nothing unless third party I've noticed.

Not necessarily. I don't think there is anything inherently wrong with the JB4 itself in general. For every bad JB4 story, there's dozens and dozens of good ones. I think the age and condition of your engine and the installer all play a part in the success of the JB4.

Rick4345 · 08-31-2017, 09:58 PM

Quote:

Originally Posted by maxdobe

Quote:

Originally Posted by jmg

Ouch, sorry to hear OP. Worst case scenario here:

http://f30.bimmerpost.com/forums/sho...6&postcount=26

So is it really true that anything else but MPPSK or Dinan is junk, as thread above implies ? I mean, besides mppsk, what OEM mod is out there to do for our 4 series m sports?? Nada. Nothing unless third party I've noticed.

I've never dealt with a JB4.

I do know if you put one on you take a chance if something craps out and the car is under warranty.

At least with a Dinan or MPPK you can go into your dealer and not have to hide the fact you have a tune. You go in after taking off your JB4 and tell the service department "Gee, I don't know what happened" you'll probably get laughed at.

Polo08816 · 09-01-2017, 07:34 AM

Quote:

Originally Posted by Rick4345

I've never dealt with a JB4.

I do know if you put one on you take a chance if something craps out and the car is under warranty.

At least with a Dinan or MPPK you can go into your dealer and not have to hide the fact you have a tune. You go in after taking off your JB4 and tell the service department "Gee, I don't know what happened" you'll probably get laughed at.

Is the MPPK technically covered by an extended warranty once you're past 4 years/50,000 miles?

Jordan · 09-01-2017, 08:08 AM

I'm shocked the dealer doesn't want to diagnose... maybe try another dealer. At least if they can identify the issue you can decide if it's worth it or fix or sell as is.

Mouse · 09-01-2017, 08:16 AM

Have you tried removing the JB4 and seeing how the car runs after? If it's fine, maybe the JB4 board is the only thing that was damaged. If it still runs like poo, see if the dealer will check it after the JB4 is removed. I know a lot of people run into issues of not being able to have their car checked because of a piggyback installed.

izaazk · 09-01-2017, 10:28 AM

Quote:

Originally Posted by Mouse

Have you tried removing the JB4 and seeing how the car runs after? If it's fine, maybe the JB4 board is the only thing that was damaged. If it still runs like poo, see if the dealer will check it after the JB4 is removed. I know a lot of people run into issues of not being able to have their car checked because of a piggyback installed.

Jb4 was removed months ago ...

Dealer doesn't wana check the car because of catless DP and spliced wiring (tmap ground) lol

I'll have to find a performance shop to take it to

FutureHendr1x · 09-01-2017, 11:45 AM

revert everything back to stock man go to the dealer...if warranty

08-31-2017, 05:02 PM	#1
izaazk Captain 140 Rep 625 Posts Drives: 2013 335i Join Date: Aug 2016 Location: Chicago, Illinois iTrader: (1)	Need Advice Please: To keep or not to keep So for the past few months ive been having powertrain issues with my 12'335i. I bought it 6 months ago for $20k out the door used with 45k miles on it! I have every package they offered at the time except Msport... ----- Recently had installed jb4 and tmap ground was fried... ever since.. car runs like shit... low end power is completely gone (feels slow as shit) I keep getting a check engine light for P112E code --> manifold pressure lower then throttle angle... Ive been to 2 indy shops (1 said bad DME, 1 said need more time) Dealer doesnt wana diagnose it because its "too modified" Should i keep trying to fix it or trade it in...?? I cant find another 335 for 20-24k with similar packages and mileage :/
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08-31-2017, 06:10 PM	#2
MaximusJ Colonel 303 Rep 2,485 Posts Drives: 340Xi MG 2017 Join Date: Jul 2010 Location: Quebec, Canada iTrader: (21) Garage List 2017 BMW 340XI (F30) [9.00] 2006 BMW 325I (E90) [7.44]	I wouldnt sell a car that has a problem honestly. It will Massively affect the value and it could take some time to sell (and implying you driving it all this time). I would concentrate on fixing the issue; then decide if you should keep it or not. __________________ Mineral Grey '17 F30 340XI [Garage] // [Build Journal] Jet Black '06 E90 325I [Garage]
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08-31-2017, 06:59 PM	#3
mdai245 First Lieutenant 104 Rep 340 Posts Drives: 440i XDrive Join Date: Oct 2014 Location: NJ iTrader: (1)	"Had jb4 installed..." Did you take back to the shop that did the install and ask them to fix it? It sounds like they broke it. Based on posts I have seen regarding JB4 installs, its really easy to fry the DME if the install er doesnt know what they are doing.
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08-31-2017, 08:22 PM	#4
jmg Lieutenant General 18708 Rep 14,115 Posts Drives: G82 M4C X-Drive Join Date: Mar 2013 Location: Orange County, CA iTrader: (1) Garage List 2022 G82 M4C X-Drive [9.85] 2018 F80 M3 CS [9.87] 2019 i3 BEV [0.00]	Ouch, sorry to hear OP. Worst case scenario here: http://f30.bimmerpost.com/forums/sho...6&postcount=26 __________________ 2022 G82///M4 Competition X-Drive - KW-HAS, EBC Bluestuff, Millway Race Camber Plates, Cup2 Connect, PSI High Flow Midpipe, Lightweight Front Lip, M Perf Flow Through Wing Previous • 2018 F80 ///M3 CS • 2016 F80 ///*M3 IG: Raging_G82
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08-31-2017, 09:35 PM	#6
izaazk Captain 140 Rep 625 Posts Drives: 2013 335i Join Date: Aug 2016 Location: Chicago, Illinois iTrader: (1)	See i thought it was the DME in my situation too but the car ran fine for a long time after that fix... recently (no changes by me) causes it to run super slow... but its Intermitent so its hard to identify the issue.... The indy's bmw scan tool said that the DME, throttle body, and EGS( I think) lose signal while im driving...
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09-01-2017, 08:08 AM	#10
Jordan Enlisted Member 15 Rep 36 Posts Drives: 340i xDrive (2017) Join Date: Mar 2012 Location: Connecticut iTrader: (0)	I'm shocked the dealer doesn't want to diagnose... maybe try another dealer. At least if they can identify the issue you can decide if it's worth it or fix or sell as is.
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09-01-2017, 08:16 AM	#11
Mouse Second Lieutenant 95 Rep 279 Posts Drives: 2013F30 335i Join Date: Aug 2016 Location: Cypress, TX iTrader: (0)	Have you tried removing the JB4 and seeing how the car runs after? If it's fine, maybe the JB4 board is the only thing that was damaged. If it still runs like poo, see if the dealer will check it after the JB4 is removed. I know a lot of people run into issues of not being able to have their car checked because of a piggyback installed.
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09-01-2017, 11:45 AM	#13
FutureHendr1x Private First Class 35 Rep 164 Posts Drives: F30 335 Msport Join Date: Jun 2017 Location: Socal 818 iTrader: (0)	revert everything back to stock man go to the dealer...if warranty
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