[M2guru]

Three 20 minute sessions. Got done with two and near the end of the second I started feeling some misfires. Partway through the third session I got a drivetrain malfunction with codes: 140001, 140010, 140201, 140210. Check engine light stayed on after restarting the engine, but seemed to run better than before shutting it off. Restarted the car and drove home with continued misfires.

Got home and flashed to stock. Now I am getting codes: 021208 and CD8486 and with the car saying "Fuel System: Continued driving possible. Consult service center."

This is with HEX/VF Engineering Stage 2. I'll be dropping them an email, too, to see what they advise, but am wondering if anyone has ideas or similar experiences (misfires or after reflash to stock). This is a MY18, MT, almost 10,000 miles, FMIC, charge pipe, highflow cat.

Thanks in advance!

[GerardzM]

Haven't had an experience as such. But please do keep us posted.


Not sure if anyone has reliably driven the car hard on track with a tune.

[tth86]

One step colder spark plugs

[Lukeni]

Originally Posted by GerardzM

Haven't had an experience as such. But please do keep us posted.


Not sure if anyone has reliably driven the car hard on track with a tune.

Active autowerke has a track tested tune.

[cookiesowns]

This is exactly why I've never been an advocate for "canned" tunes for track work use, unless they claim and provide data that it has been track proven.

The M2 N55 is already a very high strung motor, and honestly in stock form under overboost conditions ( the good kind ) it performs similarly to a stage 1.5 tune setup.

With that said, I would definitely pull the codes and see what they are now. Reset will more than likely clear it up. But given your reports I suspect the following:

1) HPFP was crashing due to the fuel demands of track abuse
2) Getting timing corrections due to not enough octane or high IAT/EGT/Stress and car throwing codes as a result
3) Misfire codes were a result of the HPFP crashing
4) the fuel light/code is most likely a fuel pressure plausibility or fuel mass error, again due to HPFP running out of volume.

I would definitely pull your plugs and check for signs of detonation or running lean. And maybe boroscope the cylinders if you have the tools and knowledge to do so.

I personally have 2 maps for my car. One that I can beat around daily and won't pull the fun at slightly higher than usual IAT/Coolant temps.

My track tune runs a lesser amount of peak boost with a more linear boost curve. I run the fuel just a notch richer at the top end.

I also make adjustments to the timing,IAT,and load ceiling compensation tables to reduce power as the car gets hotter than I want it. This will make it so that the temps don't keep sky rocketing if it cannot keep it in check.

[M2guru]

So the issue with the re-flash to stock was my own - didn't follow the last instruction. That issue is now resolved - thanks VF-Engineering. The misfiring still needs to be resolved and is still happening with the stock flash. I'll be replacing the plugs myself within a couple weeks to see if that solves the problem - I'll note their condition as well. I'll continue to report back for those interested.

[Tricki]

Originally Posted by cookiesowns

This is exactly why I've never been an advocate for "canned" tunes for track work use, unless they claim and provide data that it has been track proven.

The M2 N55 is already a very high strung motor, and honestly in stock form under overboost conditions ( the good kind ) it performs similarly to a stage 1.5 tune setup.

With that said, I would definitely pull the codes and see what they are now. Reset will more than likely clear it up. But given your reports I suspect the following:

1) HPFP was crashing due to the fuel demands of track abuse
2) Getting timing corrections due to not enough octane or high IAT/EGT/Stress and car throwing codes as a result
3) Misfire codes were a result of the HPFP crashing
4) the fuel light/code is most likely a fuel pressure plausibility or fuel mass error, again due to HPFP running out of volume.

I would definitely pull your plugs and check for signs of detonation or running lean. And maybe boroscope the cylinders if you have the tools and knowledge to do so.

I personally have 2 maps for my car. One that I can beat around daily and won't pull the fun at slightly higher than usual IAT/Coolant temps.

My track tune runs a lesser amount of peak boost with a more linear boost curve. I run the fuel just a notch richer at the top end.

I also make adjustments to the timing,IAT,and load ceiling compensation tables to reduce power as the car gets hotter than I want it. This will make it so that the temps don't keep sky rocketing if it cannot keep it in check.

All I know is that our HPFP is rubbish and there is a solution but the upgrade is ridiculously expensive!!

[UltraMagneticAL]

my BM3 OTS2 map ran fine. PTF sent me a slightly revised map to play around with, and while i broke 400whp on that map, it also crashed above 6k rpm due to fuel pressures not meeting the target as per the logs. i flashed it back to OTS2 after that issue, and now back to stock map to sell the car, and i didn't have any issues w/ misfiring or fuel pressure crashing.

[M2guru]

I don't think that the HPFP has anything to do with my issue. The stage two tune has nothing like, what I assume, the airflow and required fuel for the upgraded Dinan (or other) turbo and there is no HPFP upgrade to their kit/package. My car has experienced what felt like hesitation/missing in the past with the tune, but it was never so much to throw codes until the track day. I'll know more after pulling the plugs, but I am guessing that things will be good after plug replacement. At least the codes indicated that worst cyl is #2.

[DrKevM5]

Originally Posted by tth86

One step colder spark plugs

Truth...

[cookiesowns]

Originally Posted by M2guru

I don't think that the HPFP has anything to do with my issue. The stage two tune has nothing like, what I assume, the airflow and required fuel for the upgraded Dinan (or other) turbo and there is no HPFP upgrade to their kit/package. My car has experienced what felt like hesitation/missing in the past with the tune, but it was never so much to throw codes until the track day. I'll know more after pulling the plugs, but I am guessing that things will be good after plug replacement. At least the codes indicated that worst cyl is #2.

The fact that you threw a fuel system light points more closely to a fuel delivery issue. Granted if you ran the tank below 1/4 or 1/2 you may have fuel starvation in corners so that's a possibility too.

[M2guru]

Originally Posted by cookiesowns

The fact that you threw a fuel system light points more closely to a fuel delivery issue. Granted if you ran the tank below 1/4 or 1/2 you may have fuel starvation in corners so that's a possibility too.

Thank you for continuing to help resolve the issue and for sharing your thoughts. I can see how it appears that it was a fuel delivery problem, but that code didn't come up while driving. it was my own mistake in not following the re-flash instructions that caused that code to come up. The only codes as a result of driving were the codes related to the misfire. Once I re-flashed correctly, that fuel system error went away - it was totally related to the partial re-flash.

And THIS TIME at the track, I didn't run out of fuel - I remembered to fill up. :-) I think I'll be looking into the Dinan fix for that soon.

[VF-Engineering]

Just for reference, the customer never had a fault code
related to the fuel system.

The "Fuel System: Continued driving possible." warning
that he received in-car was due to forgetting to write in
the coding data after the flashing process. Once he was
able to reconnect the HEX Flash Cable and complete that
step of the process, that warning is immediately gone.



In regards to the misfires he experienced on track, we
are in the process of helping him diagnose the cause.

Because the misfire symptoms were still present even
when flashed back to stock, the first recommendation
is to replace the spark plugs, to OEM spec and gap, as
that's what all of our testing and validation for this
application was based on.

With traditional pump fuel, as well as proper unleaded
race fuels, we do not typically see misfire symptoms
even during aggressive track use. That being said, for
Stage TWO applications we do see that the the life
expectancy of the plugs diminish more rapidly and
recommend replacing them at around 10,000 miles.

[M2guru]

Originally Posted by VF-Engineering

Just for reference, the customer never had a fault code
related to the fuel system.

The "Fuel System: Continued driving possible." warning
that he received in-car was due to forgetting to write in
the coding data after the flashing process. Once he was
able to reconnect the HEX Flash Cable and complete that
step of the process, that warning is immediately gone.

In regards to the misfires he experienced on track, we
are in the process of helping him diagnose the cause.

Because the misfire symptoms were still present even
when flashed back to stock, the first recommendation
is to replace the spark plugs, to OEM spec and gap, as
that's what all of our testing and validation for this
application was based on.

With traditional pump fuel, as well as proper unleaded
race fuels, we do not typically see misfire symptoms
even during aggressive track use. That being said, for
Stage TWO applications we do see that the the life
expectancy of the plugs diminish more rapidly and
recommend replacing them at around 10,000 miles.

All of this is true. Factory plugs en route to my house as we speak. I will be swapping the plugs towards the middle of next week. The car currently has no error codes, but it is still misfiring at WOT...just not enough to cause the error codes for misfiring to come back (yet) and I doubt they will because I won't be pushing the car until after I replace the plugs.

[cecaa850]

Originally Posted by M2guru

All of this is true. Factory plugs en route to my house as we speak. I will be swapping the plugs towards the middle of next week. The car currently has no error codes, but it is still misfiring at WOT...just not enough to cause the error codes for misfiring to come back (yet) and I doubt they will because I won't be pushing the car until after I replace the plugs.

Yes, missing under a load is typically ignition related.

[cookiesowns]

Originally Posted by M2guru

Thank you for continuing to help resolve the issue and for sharing your thoughts. I can see how it appears that it was a fuel delivery problem, but that code didn't come up while driving. it was my own mistake in not following the re-flash instructions that caused that code to come up. The only codes as a result of driving were the codes related to the misfire. Once I re-flashed correctly, that fuel system error went away - it was totally related to the partial re-flash.

And THIS TIME at the track, I didn't run out of fuel - I remembered to fill up. :-) I think I'll be looking into the Dinan fix for that soon.

Got it, must have missed that detail in-between the posts. Yeah forsure sounds like ignition problem instead of fuel issue if it's happening on stock tune.

While these factory Bosch plugs are good, it seems like they have issues standing up to heat on the ceramic portion, ironically since they are a "motorsport" derived sparkplug lol.

The NGK's seem to be better in this regard but lifespan is even less than the Bosch's, but at least the ceramic portion won't crack as often due to heat. Just need to choose a good gap. 0.025, or 0.023 is perfect for a "stage2" car.

[M2guru]

Swapped plugs tonight and didn't see anything obvious. All were gapped at .70mm. Let me know if you see anything (anyone). When I go to work tomorrow I'll see if the hesitation is still there and will report back.

[dcmac]

I am running Active’s track-ready tune and have had no problems. Four track events so far, 3 in very high temps, and pushed the car as hard as possible. Very impressive.

[M-Supra]

Originally Posted by Tricki

All I know is that our HPFP is rubbish and there is a solution but the upgrade is ridiculously expensive!!

The factory fuel system will support 500+hp at crank...it's all in the tuning, just ask SeanWRT

http://www.bootmod3.net/log?id=5b38d28fd10b437334792d1b

[M2guru]

The replacement of the plugs seemed to be the ticket - no missing with the Hex Stage 2 tune. It seems pretty early in my opinion, but that's not based on much experience with this car or BMWs. The only thing I can see on the plugs is what appears to be deposits on the electrode - not sure I could blame anything but the gas for that (have always been running BP 93 octane - typically from the same station).

[m2rs4_official]

Originally Posted by M2guru

So the issue with the re-flash to stock was my own - didn't follow the last instruction. That issue is now resolved - thanks VF-Engineering. The misfiring still needs to be resolved and is still happening with the stock flash. I'll be replacing the plugs myself within a couple weeks to see if that solves the problem - I'll note their condition as well. I'll continue to report back for those interested.

Originally Posted by M2guru

Three 20 minute sessions. Got done with two and near the end of the second I started feeling some misfires. Partway through the third session I got a drivetrain malfunction with codes: 140001, 140010, 140201, 140210. Check engine light stayed on after restarting the engine, but seemed to run better than before shutting it off. Restarted the car and drove home with continued misfires.

Got home and flashed to stock. Now I am getting codes: 021208 and CD8486 and with the car saying "Fuel System: Continued driving possible. Consult service center."

This is with HEX/VF Engineering Stage 2. I'll be dropping them an email, too, to see what they advise, but am wondering if anyone has ideas or similar experiences (misfires or after reflash to stock). This is a MY18, MT, almost 10,000 miles, FMIC, charge pipe, highflow cat.

Thanks in advance!

Hi M2Guru, stumbled on your post and was wondering if i could be enduring a similar symptom to your vehicle.

I was previously on the VF Engineering Stage 2 map which was awesome until I decided to upgrade to a pure turbo stage 2. Similarly to your vehicle, I'm getting 140001 , 140010 , 140301 & 140310 of which is probably referencing to cylinder 3.

Previously before the pure turbo upgrade whilst running the VFE Stg2 map, I had a similar issue and took the vehicle to the dealer and they just swapped out coil 5 and the car was running fine but I didn't give it sufficient time to test as the following day I did the turbo ugrade.

My vehicle is running the following:
Pure Turbo Stage 2
XDI35 HPFP
Precision Racewerks Coils
Wagner Comp IC
Turbosmart Dual Port BOV
Fi Exhaust TBE (catless)
VSF Charge Pipe Upgrade

The blimming misfiring has comeback to haunt me. It occurred today during a WOT attempt from around 2500 in 3rd gear and choked around 4K rpm.

I do have some NGK two step colder plugs NGK97506 which I'm keen to install but am a tad skeptical it will resolve the issue.

Btw the car is tuned by Wedge Performance with the HPFP & P.R Coil option enabled. I'll probably flick em an email later similar to yours to VFE.

Thank you in advance for your help.

Originally Posted by tth86

One step colder spark plugs

Just wanted to seek your friendly advise if cold plugs could be the remedy and what the justification for colder plugs would be. Sorry for being a noob.

[m2rs4_official]

Turns out, nothing wrong with my coils and plugs. The coils weren't fully clicked in place.