Drivetrain malfunction with jb4

SS.F82 · 06-12-2017, 10:10 PM

Hey guys yesterday I was out in Mexico! ? And did some Money runs from a dig..

mods on the car is JB4 KNN drop in filters MPE and Downpipes

I was on map 2 with about 3.5 gallons of E85 after I ripped it from a dig I won the race

and then after I stopped at the next light my car threw a code! "drivetrain malfunction" car felt like it was bogging out

I've had jb4 installed for 2.5 months not and has not let me down I turned off the car let it sit for a 5 mins turned it back on and it was fine again?

Anything to be worried about is this common? It was also

It was also 90 Degrees yesterday another thing that made me think the car was just tired of being pushed in the heat

Mike@N54Tuning.com · 06-13-2017, 06:03 AM

Misfire faults are from plugs, maybe fuel pump unable to keep up with the power levels and E85, etc.

Mike

CaryTheLabelGuy · 06-13-2017, 06:52 AM

Quote:

Originally Posted by SS.F82

Hey guys yesterday I was out in Mexico! ? And did some Money runs from a dig..

mods on the car is JB4 KNN drop in filters MPE and Downpipes

I was on map 2 with about 3.5 gallons of E85 after I ripped it from a dig I won the race

and then after I stopped at the next light my car threw a code! "drivetrain malfunction" car felt like it was bogging out

I've had jb4 installed for 2.5 months not and has not let me down I turned off the car let it sit for a 5 mins turned it back on and it was fine again?

Anything to be worried about is this common? It was also

It was also 90 Degrees yesterday another thing that made me think the car was just tired of being pushed in the heat

These are most likely from either fuel trims too high, causing the DME to run off the Superknock Fuel Table, which is tuned extremely rich. Or your plugs need to be re-gapped/replaced. Or a combination of both.

What is your FOL set at?

Is this a ZCP or non-ZCP? The non-ZCP cannot tolerate much more than 3 or so gallons of E85 mixed with E10 pump fuel. The ZCP is better in that it can can go as high as E40 or so with an FOL of 80-ish.

Also, what you experienced was the DME shutting off fuel to the offending cylinders (misfires) to protect the engine. It didn't hurt anything and is cleared after a restart.

SS.F82 · 06-13-2017, 11:35 AM

Quote:

Originally Posted by CaryTheLabelGuy

Quote:

Originally Posted by SS.F82

Hey guys yesterday I was out in Mexico! ? And did some Money runs from a dig..

mods on the car is JB4 KNN drop in filters MPE and Downpipes

I was on map 2 with about 3.5 gallons of E85 after I ripped it from a dig I won the race

and then after I stopped at the next light my car threw a code! "drivetrain malfunction" car felt like it was bogging out

I've had jb4 installed for 2.5 months not and has not let me down I turned off the car let it sit for a 5 mins turned it back on and it was fine again?

Anything to be worried about is this common? It was also

It was also 90 Degrees yesterday another thing that made me think the car was just tired of being pushed in the heat

These are most likely from either fuel trims too high, causing the DME to run off the Superknock Fuel Table, which is tuned extremely rich. Or your plugs need to be re-gapped/replaced. Or a combination of both.

What is your FOL set at?

Is this a ZCP or non-ZCP? The non-ZCP cannot tolerate much more than 3 or so gallons of E85 mixed with E10 pump fuel. The ZCP is better in that it can can go as high as E40 or so with an FOL of 80-ish.

Also, what you experienced was the DME shutting off fuel to the offending cylinders (misfires) to protect the engine. It didn't hurt anything and is cleared after a restart.

Non ZCP FOL is set at 70 should I put it back to 60?

Also thanks for the helpful reply

SS.F82 · 06-13-2017, 11:36 AM

Quote:

Originally Posted by Mike@N54Tuning.com

Misfire faults are from plugs, maybe fuel pump unable to keep up with the power levels and E85, etc.

Mike

Thank you! Also am going to the track Friday how much race gas are you supposed to use a full tank? Or a cpl gallons in map 7? And what kinda race gas 109? C16?

CaryTheLabelGuy · 06-13-2017, 12:15 PM

Quote:

Originally Posted by SS.F82

Non ZCP FOL is set at 70 should I put it back to 60?

Also thanks for the helpful reply

When did you start running this E85 mix? And no, you may want to try running a slightly higher FOL (72).

CaryTheLabelGuy · 06-13-2017, 12:16 PM

Quote:

Originally Posted by SS.F82

Thank you! Also am going to the track Friday how much race gas are you supposed to use a full tank? Or a cpl gallons in map 7? And what kinda race gas 109? C16?

Just hold off on all that until we get you squared away on this E85 mix you're running.

SS.F82 · 06-13-2017, 12:17 PM

Quote:

Originally Posted by CaryTheLabelGuy

Quote:

Originally Posted by SS.F82

Non ZCP FOL is set at 70 should I put it back to 60?

Also thanks for the helpful reply

When did you start running this E85 mix?

I don't run it every day because we simply don't have it on pump here lol I only run it when I head out for some runs

CaryTheLabelGuy · 06-13-2017, 12:17 PM

Quote:

Originally Posted by Mike@N54Tuning.com

Misfire faults are from plugs, maybe fuel pump unable to keep up with the power levels and E85, etc.

Mike

This isn't necessarily true.

CaryTheLabelGuy · 06-13-2017, 12:20 PM

Quote:

Originally Posted by SS.F82

I don't run it every day because we simply don't have it on pump here lol I only run it when I head out for some runs

You have to give the DME a few pulls to get fuel trims situated. And the JB4 needs it as well to know how to manipulate the fuel pressure sensor.

SS.F82 · 06-13-2017, 12:27 PM

Quote:

Originally Posted by CaryTheLabelGuy

Quote:

Originally Posted by SS.F82

I don't run it every day because we simply don't have it on pump here lol I only run it when I head out for some runs

You have to give the DME a few pulls to get fuel trims situated. And the JB4 needs it as well to know how to manipulate the fuel pressure sensor.

I did 4 highway pulls on the way down it was running fine until the last launch lol what fuel is recommended for map 7 tho?

CaryTheLabelGuy · 06-13-2017, 01:16 PM

Quote:

Originally Posted by SS.F82

I did 4 highway pulls on the way down it was running fine until the last launch lol what fuel is recommended for map 7 tho?

Map 7 is probably too much boost for the amount of ethanol you're running, especially for the non-ZCP tune. It causes fuel trims to go too high which, like stated above, causes the DME to run on the Superknock Fuel Table (which runs in the low 10:1 AFR range). It's a protection feature of the DME. Running this rich causes misfires, especially when running ethanol mixtures.

Try upping FOL to 72/73 and see what it does.

Were you datalogging?

SS.F82 · 06-13-2017, 01:19 PM

Quote:

Originally Posted by CaryTheLabelGuy

Quote:

Originally Posted by SS.F82

I did 4 highway pulls on the way down it was running fine until the last launch lol what fuel is recommended for map 7 tho?

Map 7 is probably too much boost for the amount of ethanol you're running, especially for the non-ZCP tune. It causes fuel trims to go too high which, like stated above, causes the DME to run on the Superknock Fuel Table (which runs in the low 10:1 AFR range). It's a protection feature of the DME. Running this rich causes misfires, especially when running ethanol mixtures.

Try upping FOL to 72/73 and see what it does.

Were you datalogging?

No I was not data logging I will change the FOL do you need some WOT logs?

CaryTheLabelGuy · 06-13-2017, 01:20 PM

Quote:

Originally Posted by SS.F82

No I was not data logging I will change the FOL do you need some WOT logs?

Yes. Datalogs are always helpful and and really the only way to be certain.

SS.F82 · 06-13-2017, 01:22 PM

Quote:

Originally Posted by CaryTheLabelGuy

Quote:

Originally Posted by SS.F82

No I was not data logging I will change the FOL do you need some WOT logs?

Yes. Datalogs are always helpful and and really the only way to be certain.

Hear ya! I took the car in for inspection 2 days ago and put back on OEM DownPipes and never put back in my catless ones

I was on map 2 with the oem DownPipes when this happened could that have something to do with it?

CaryTheLabelGuy · 06-13-2017, 01:57 PM

Quote:

Originally Posted by SS.F82

Hear ya! I took the car in for inspection 2 days ago and put back on OEM DownPipes and never put back in my catless ones

I was on map 2 with the oem DownPipes when this happened could that have something to do with it?

It's hard to say without a datalog.

06-12-2017, 10:10 PM	#1
SS.F82 Enlisted Member 5 Rep 38 Posts Drives: '15 F82 M4 Silverstone Join Date: Mar 2017 Location: Wyomissing PA iTrader: (0)	Drivetrain malfunction with jb4 Hey guys yesterday I was out in Mexico! ? And did some Money runs from a dig.. mods on the car is JB4 KNN drop in filters MPE and Downpipes I was on map 2 with about 3.5 gallons of E85 after I ripped it from a dig I won the race and then after I stopped at the next light my car threw a code! "drivetrain malfunction" car felt like it was bogging out I've had jb4 installed for 2.5 months not and has not let me down I turned off the car let it sit for a 5 mins turned it back on and it was fine again? Anything to be worried about is this common? It was also It was also 90 Degrees yesterday another thing that made me think the car was just tired of being pushed in the heat Attached Images __________________ '15 SS/SS M4
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06-13-2017, 06:03 AM	#2
Mike@N54Tuning.com Joint Chiefs of Staff 4918 Rep 115,980 Posts Drives: 2007 335i, 2015 M3 Join Date: Dec 2008 Location: N54tuning.com iTrader: (89)	Misfire faults are from plugs, maybe fuel pump unable to keep up with the power levels and E85, etc. Mike
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