trackjunkie

sounds promising. i got beta version to test also. i have a track event scheduled the first week of june. but not sure if the event will get canceled or not.

Ugnius@VersaTune

Update: A number of volunteers contacted us and tested the fix, 100% of them reported they were no longer able to reproduce the random fuel cut. As a result, we decided to release the fix publicly. It is included in the maintenance update 1.13.160 for VersaTuner. You can get it using the automatic update functionality in the app or download from here https://www.versatuner.com/licenses
Make sure you flash any tune (e.g. the one you flashed last) to apply the fix.

Fixed calibrations are: N3ZDEJ, N3ZBEJ, N3M1EK, N3M5EK, N3Z2EU
If you experience the same issue on any other calibration or the fix does not work for you, please let us know.

Kimura

Just going to post for the record, I've been having what I thought was an ECU or CAN bus issue where the tach would drop to zero with possible loss of power then return. I had this happen once at idle too and it stalled out. That time the fuel pump wouldn't fully prime to restart the car till I disconnected and reconnected the battery. Not sure if any of it is due to the above issue but I will be re-flashing with the update to see how it goes.

Edited to update:
So far so good, I have not had the issue return.
+1k mi later no issues!

Shylock1908

I had an affected calibration but am going to reflash tomorrow, will post any results. Thank you for staying active!

trackjunkie

did about 300 street miles on the new flash. so far so good. but i rarely had issues with engine cut off on the street before. but on track it was pretty much every session out. unfortunately none of the regional tracks have opened yet.

hufflepuff

Hey Ugnius, i have calibration N3ZDEH and i have experienced the cutout previously multiple times as well. Will 1.13.160 work for N3ZDEH as well?

Edit, i also see that on the website it is now 1.13.162.0?

hufflepuff

this was exactly my issue too. haven't tried the new flash yet. my ECU calibration is not listed.

Ugnius@VersaTune

No, we have not fixed your calibration because no one reported it before. We will fix it and release a new update this week.

hufflepuff

The "fix" is working for me so far. Thanks Ugnius.

Questions for the rest of folks adjusting their fueling:
Are you making fuel maps 1, 2, and 3 all the same, or keeping them different?
Do you know which map is used for "normal" operation?
Have you determined under which conditions the ECU uses the three maps? One of my versatuner buddies has a theory that it's based on knock, but i'm thinking engine temperature could also be another factor.

dallasreed

For setting fuel you really only need to work with the volumetric efficiency table.

I set the a/f tables as desired but found in practice other than closed loop they don't do much.

Brettus

iTrader: (2)

The fuel by gear maps don't work as labelled . If you can be bothered testing them you'd find that one of the maps does most of the gears and rpms . It does swap over to another map at some point but it can be different from car to car and for myself I've found it way easier to just leave all those maps the same and adjust them all at once. I generally leave the Ve map alone.

trackjunkie

just completed first track weekend of the year, with the new updated software. happy to report no more engine cut off issues. the car ran great.

had a small hickup while on the dyno at the track. my heart skipped a beat when i thought i bricked the ecu. was flashing a different while on the dyno and the laptop froze up in the middle of the flash. had to close out the software. then when i tried to reflash, it said i had to restore to factory map. i did that and then had to reinstall versaturner on the ecu again. luckily everything worked out again. although it said it would take 30 minutes to reinstall, so i rolled off the dyno because i didnt want to hold up the line, it end up only taking less than a minute to reinstall, so i could have stayed on the dyno to do more pulls with different maps.

VTRX8

Thanks so much for posting this as I have been having the exact same issue. For me it was fast uphill left turns at track out where mine would cut out for less than 1/2 a second. By the end of the day at Palmer, MA it was happening too often at exit of turn 9 (clockwise) that I had to pack it up for the day. Thought of loss of oil pressure, gas starvation, battery leads, kill switch, and looked for other loose wires. Nothing, So did the new Versatuner flash last night and we shall see at Club Motorsport how it goes. I wish I could test it on the street first, but the car has never been registered. THANKS again! (FIgured you always have to post a pic so here is random one for a few weeks ago)

trackjunkie

if you had the same issues at the same spot on track, then it might not be tune. for me it would happened randomly all over the place. but if you ECU ID is on the list, then it might as well be the issue.

Kimura

I had it happen several times at the same uphill right turn and that made me think something was happening there, but it wasn't 100% of the time. There was some kind of pattern to it for me. About 2k miles in on the patch now and no return of the issue.

Diyman25

recent Track day. my car develop Random engine cut off too
at first this seen a lot like fuel starvation , but after fuel car to full tank, it still happend, and by diagnostic the file, i find out the RPM signal loose during cut off time
this remind me of what happend on the example i seen on the thread, i have not down load the new versatune yet
i need to do it before next track event


cut off happend around 10sec mark

trackjunkie

yeah looks about exactly what i was experiencing. check your Calibration ID to see if its one on the list. the updated version should fix all the calibration id that's on the list. if yours is not on the list, then they would probably have to fix that too for the next release. my issue has been fixed since the new version.

Diyman25

I have experinese similar cut off from last two track day, you can see my above post. when it happend my RPM singal from OBD2 will loose for brief montment
my ECU is N3ZDEH