JB4 issue: Drive train malfunction UPDATE!

[orevah]

Update as follows in bold:

So I have finally had time to clear codes. I updated the Firmware just recently. I brought the car back in to see if the shop that installed my tune can figure out the problem and i was told that they needed to connect map 3 fuel mass connection. So they went ahead and installed the connections for map 3 put it back in map 2 and it was a success. Would someone like to chime in and explain to me why you need fuel mass connection in order to run map 2? Car is running amazing now. very satisfied.

I would really appreciate some feedback on the issue i had today. I have a JB4 currently on my m4 on map 2 along with ER downpipes and BMC filters. Today i was running the car as i usually do which is pretty aggressively. Then all of a sudden i was at around 6500 RPM in 3rd gear and my car went into some sort of lymp mode with a drive train malfunction light. I immediately pulled over and the car didn't sound right. The whole car seemed to be trembling. so i pulled into my house which is not far by and i turned the vehicle off and waited a little bit. Then i returned to my vehicle and light was gone. Any thoughts on what this could be? i have had the car with the JB4 in it for about 2 weeks and it was running very well this was so sudden. I have also realized that sometimes when i am in a higher RPM anything 6k and above the car seems to be choking is this normal since i see the dyne graphs seem to be losing power around that RPM?

best

[Andrew115]

Get with someone from Burger and share your logs. They are quite helpful. I had a similar issue with my F30. Same message, kept coming and going. No other issues luckily. I am going another direction with the F80, not worth the hassle for me for a few extra ponies. They will usually have the highest power option but with this engine I am not needing the most.

Good luck. Hope it works out and find nothing damaged.

[orevah]

Was anything damaged on your f30?

[Mike@N54Tuning.com]

Just use the JB4 to read the codes. Sounds like a misfire code to me. If you are using map 2 it could be too strong for your fuel or could be a sign you need to connect the Stage3 fuel control if you haven't already. Another good test would be to go down to map 1.

Mike

[flewbyu335]

Originally Posted by orevah

I would really appreciate some feedback on the issue i had today. I have a JB4 currently on my m4 on map 2 along with ER downpipes and BMC filters. Today i was running the car as i usually do which is pretty aggressively. Then all of a sudden i was at around 6500 RPM in 3rd gear and my car went into some sort of lymp mode with a drive train malfunction light. I immediately pulled over and the car didn't sound right. The whole car seemed to be trembling. so i pulled into my house which is not far by and i turned the vehicle off and waited a little bit. Then i returned to my vehicle and light was gone. Any thoughts on what this could be? i have had the car with the JB4 in it for about 2 weeks and it was running very well this was so sudden. I have also realized that sometimes when i am in a higher RPM anything 6k and above the car seems to be choking is this normal since i see the dyne graphs seem to be losing power around that RPM?

best

More info what kind of fuel were you using, temp.
Most of the time it has to do with the vehicle maxing out fuel and jb4 goes into limp mode and so does the car after shutting off and starting up again issue should go away

[orevah]

I am using 93 octane usually from a mobil gas station or v-power 93 octane from a shell. temperature was colder then usual here in florida a little chilly. I also was low on fuel only had about 10 miles left could that play a part? and mike only up to stage 2 connecters are connected. what is stage 3 fuel control?

[Andrew115]

Originally Posted by orevah

Was anything damaged on your f30?

Nope. Everything checked out fine. Pulled it off every time I went in for service no issues.

[335iFFM]

Originally Posted by orevah

I am using 93 octane usually from a mobil gas station or v-power 93 octane from a shell. temperature was colder then usual here in florida a little chilly. I also was low on fuel only had about 10 miles left could that play a part? and mike only up to stage 2 connecters are connected. what is stage 3 fuel control?

Most likely that was the problem. Never go WOT when fuel is empty

[NickRac]

This has happened to me 6 times now.

Generally the first time it happens the check engine light goes away after a restart. However the second time it happens the CEL won't go off and needs to be reset.

I drive the car extremely aggressive also. Only happens past 6,000 RPMs in third or fourth gear on a very punishing run.

Tech's looked at the car and found no issues. Just reset - 3 times now.

[orevah]

Originally Posted by NickRac

This has happened to me 6 times now.

Generally the first time it happens the check engine light goes away after a restart. However the second time it happens the CEL won't go off and needs to be reset.

I drive the car extremely aggressive also. Only happens past 6,000 RPMs in third or fourth gear on a very punishing run.

Tech's looked at the car and found no issues. Just reset - 3 times now.

exactly my issues in same gears. does your car choke in those higher RPMS? By techs do you mean BMW techs?

[Taimur]

Originally Posted by NickRac

This has happened to me 6 times now.

Generally the first time it happens the check engine light goes away after a restart. However the second time it happens the CEL won't go off and needs to be reset.

I drive the car extremely aggressive also. Only happens past 6,000 RPMs in third or fourth gear on a very punishing run.

Tech's looked at the car and found no issues. Just reset - 3 times now.

I'm not sure I like the fact the car is going into limp mode on the 93 octane map. It's knocking and the ecu is trying to save the motor. Not a good read for JB4.

[Mike@N54Tuning.com]

Originally Posted by Taimur

I'm not sure I like the fact the car is going into limp mode on the 93 octane map. It's knocking and the ecu is trying to save the motor. Not a good read for JB4.

How did you determine knock? I've never seen knock codes on the S55 unless using 87 octane.

Map 2 is an aggressive map especially in cold weather. Capable of up to 500whp. If you don't connect the Stage3 fueling connector the fuel trims go out of range, the AFR goes rich, and you get a misfire code. The simple solution is less boost via map 1 or to install the fuel connector to level out those fuel trims.

Mike

[Maddict3]

Def the fuel, it happened to me once that I pumped at a different gas station.

I always pump 93 on shell or chevron only. I was in downtown Miami and I needed gas badly so I went to a Hess. I pumped 93 but It had to be 87.

Try to stick to the same gas stations.

[NorCal f80]

We only have 91 here in So Cal and I haven't heard of anyone having these issues.

[flewbyu335]

Originally Posted by 0-100 real quick

We only have 91 here in So Cal and I haven't heard of anyone having these issues.

People dont have those issues in socal cause you guys in socal run map 1 terry designed map2 for people who can get there hands on 93

[flewbyu335]

Originally Posted by orevah

I am using 93 octane usually from a mobil gas station or v-power 93 octane from a shell. temperature was colder then usual here in florida a little chilly. I also was low on fuel only had about 10 miles left could that play a part? and mike only up to stage 2 connecters are connected. what is stage 3 fuel control?

Its more then likely due to having low fuel possibly bad fuel left in the lower part of the tank considering you were really low on fuel

[Taimur]

Originally Posted by Mike@N54Tuning.com

How did you determine knock? I've never seen knock codes on the S55 unless using 87 octane.

Map 2 is an aggressive map especially in cold weather. Capable of up to 500whp. If you don't connect the Stage3 fueling connector the fuel trims go out of range, the AFR goes rich, and you get a misfire code. The simple solution is less boost via map 1 or to install the fuel connector to level out those fuel trims.

Mike

Thanks for the explanation. Per the posts of the users who experienced the cel and stating the car got slower and missing after boosting I assumed it was knocking. But I still think the car should not be throwing any codes even in cold weather, especially running 93.

I would think then people running 93 should connect the stage3 fueling connector.

[jc05e46m3]

Originally Posted by flewbyu335

People dont have those issues in socal cause you guys in socal run map 1 terry designed map2 for people who can get there hands on 93

False.

[flewbyu335]

Originally Posted by jc05e46m3

False.

True heres terrys post clearly states map 2 is for 93 oct

http://forums.n54tech.com/showthread.php?t=25401

[Boss330]

Lots of people over on the M5 board has the same experience with their tuned M5's

This is one of the limitations with going to aggressive on a piggyback, which is why Dinan and AC Schnitzer etc don't have the highest power outputs out there from their piggybacks... They prefer to have reliable power over all out power I guess

On the M5 it usually happens during high speed and aggressive driving and I have been told it's partly due to torque limiter maps in the DME. Maps that you can't access or fool with a piggyback but which needs a software flash to overcome.

There is a member on the M5 forums that was the first to have his car flashed. And after two previous piggyback tunes where he had CEL and drivetrain malfunction he got completely rid of all of that plus his car was faster afterwards

Your issue might not be related to any of the above at all of course, but just letting you know that these issues seem to be well known on the M5 with piggyback tunes...

[Ranoz]

I never realised that flash is a better way tuning giving that I used Cobb on my 335 and never have a single issue, running sports aggressive +

[Boss330]

Originally Posted by Ranoz

I never realised that flash is a better way tuning giving that I used Cobb on my 335 and never have a single issue, running sports aggressive +

Better depends on definition I guess...

Piggybacks are easy to install and remove. Not costly and many have really good results with them.

Today there is no OBD solution to flash the DME on Fxx gen BMW's so the DME needs to be taken out of the car and opened up to crack the encryption and then be flashed before reinstalled in the car. But, they now have full access to the maps and can change any parameter such as cold start, top speed limiter, torque limiters, ignition timing, fuelling, delete CEL with catless downpipes etc. So if you want to have even more power and delete top speed this is a better solution than piggybacks which are limited to operate within BMW software boundaries (by manipulating these).