[IllSic_Design]

Originally Posted by PhillyPhilly

Bro I’m sorry how do I post the map on here for you to see? I already uploaded it to datazap.

just provide the link to datazap for the log. make sure nothings private

[PhillyPhilly]

https://datazap.me/u/phillyphilly/lo...og=0&data=3-20

[HighMile335i]

Originally Posted by PhillyPhilly

https://datazap.me/u/phillyphilly/lo...og=0&data=3-20

It looks like you got off the throttle when the problem occurred (I'm guessing) just after 6,500rpm. That's going to make it hard to tell anything from the data log. I'm not the most knowledgeable with N54 tuning, but I also had persistent misfire issues with my old 335i, so I learned a bit about data-logging.

I suspect you'll have to run another log where you don't let off the throttle when the issue occurs--that way we'll be able to see if there are timing corrections or weird lambda stuff going on. You could do this on a stock map, if you want (as it sounds like it was happening before the MHD).

[PhillyPhilly]

Originally Posted by HighMile335i

It looks like you got off the throttle when the problem occurred (I'm guessing) just after 6,500rpm. That's going to make it hard to tell anything from the data log. I'm not the most knowledgeable with N54 tuning, but I also had persistent misfire issues with my old 335i, so I learned a bit about data-logging.

I suspect you'll have to run another log where you don't let off the throttle when the issue occurs--that way we'll be able to see if there are timing corrections or weird lambda stuff going on. You could do this on a stock map, if you want (as it sounds like it was happening before the MHD).

Appreciate that my guy… and yea I only had time for three pulls today before I had to head to work. But all three pulls and it ran smoothly which is really strange? I’m gonna get a pull tomorrow 1st gear/2nd gear where it was most prevalent. So I’ll stay on it all the way through the stutters and all. Thanks guys and I really appreciate all the feedback and help. I’ll report back tomorrow.

[Saif2018]

Originally Posted by PhillyPhilly

Appreciate that my guy… and yea I only had time for three pulls today before I had to head to work. But all three pulls and it ran smoothly which is really strange? I’m gonna get a pull tomorrow 1st gear/2nd gear where it was most prevalent. So I’ll stay on it all the way through the stutters and all. Thanks guys and I really appreciate all the feedback and help. I’ll report back tomorrow.

You went from 2nd to neutral for a while then 3rd, not sure why you would do that, but do a 3rd gear log from 2500rpm wot to 4th at 6500rpm then back off after a few secs, don't go into neutral in between gears.

Also did you check the codes using MHD to see which cylinders were flagged up for misfires?

[PhillyPhilly]

Originally Posted by Saif2018

You went from 2nd to neutral for a while then 3rd, not sure why you would do that, but do a 3rd gear log from 2500rpm wot to 4th at 6500rpm then back off after a few secs, don't go into neutral in between gears.

Also did you check the codes using MHD to see which cylinders were flagged up for misfires?

It’s not a misfire… it’s a stutter kind of thing. No codes for misfires at all.

[PhillyPhilly]

I think I did it right this time… third gear WOT pull with plenty of stutters like it got bad during this pull.. PLEASE HELP!




https://datazap.me/u/phillyphilly/lo...og=0&data=3-20

[PhillyPhilly]

Oh and now I’m getting the stutter/jerkiness when I pull off in first gear too it’s not as harsh as the WOT shakes but it’s there!

[Dave92N54]

First and foremost, do you have traction control off completely? You need to hold the DTC button for about 10s. You're getting a ton of throttle closures and need to rule that out. I'm not an expert so I'm not sure if you're losing low-pressure fuel pressure and leaning out bc the DME is trying to stop your wheels from spinning or not.

Edit: Looked at the other logs. I definitely think you have traction control on still. Time for some better tires.

[PhillyPhilly]

Originally Posted by Dave92N54

First and foremost, do you have traction control off completely? You need to hold the DTC button for about 10s. You're getting a ton of throttle closures and need to rule that out. I'm not an expert so I'm not sure if you're losing low-pressure fuel pressure and leaning out bc the DME is trying to stop your wheels from spinning or not.

Edit: Looked at the other logs. I definitely think you have traction control on still. Time for some better tires.

Fuck… I forgot to turn off traction control for this most recent data log but the original video with the stutters TC is OFF and my tires are freshies! Plus like I stated the stutter is happening on first gear when I pull off regularly.

[Dave92N54]

Originally Posted by PhillyPhilly

Fuck… I forgot to turn off traction control for this most recent data log but the original video with the stutters TC is OFF and my tires are freshies! Plus like I stated the stutter is happening on first gear when I pull off regularly.

Then my first guess is your LPFP. You can see bank 1 leans out, and then it's pressure drops to like 45psi, should be above 55 at a minimum. like 65+ is ideal (though 72 is the target). I'd probably wait and see if anyone else chimes in though. Little weird that it leans out before the pressure drop.

[PhillyPhilly]

Originally Posted by Dave92N54

Then my first guess is your LPFP. You can see bank 1 leans out, and then it's pressure drops to like 45psi, should be above 55 at a minimum. like 65+ is ideal (though 72 is the target). I'd probably wait and see if anyone else chimes in though. Little weird that it leans out before the pressure drop.

Thanks for the input brother… I’ll see if anyone can chime in but I was already planning on getting the stage 2 bucketed lpfp kit from ECS tuning.

[Saif2018]

Originally Posted by PhillyPhilly

I think I did it right this time… third gear WOT pull with plenty of stutters like it got bad during this pull.. PLEASE HELP!




https://datazap.me/u/phillyphilly/lo...og=0&data=3-20

Way too many throttle closures, Relog after you've got traction fully off, I'd agree with Dave, it looks like your LPFP is tanking,

Since your logging, you might as well flash v7.1 map and log as well. Might turn out to be easier on LPFP.

[PhillyPhilly]

Originally Posted by Saif2018

Way too many throttle closures, Relog after you've got traction fully off, I'd agree with Dave, it looks like your LPFP is tanking,

Since your logging, you might as well flash v7.1 map and log as well. Might turn out to be easier on LPFP.

Thanks man… works been kicking my ass man I’ve barely had time for a log and when I do today, my dumbass forgets to turn off traction control. If you don’t mind… what’s the diff between v7.1 stage 2+ VS. v9?

Also, would you recommend the Walbro stage 2 pump over a regular one from FCP euro? I’m content with stage 2+ honestly as my Yamaha r1 is my excuse for “limiting myself on power”.

[Saif2018]

Originally Posted by PhillyPhilly

Thanks man… works been kicking my ass man I’ve barely had time for a log and when I do today, my dumbass forgets to turn off traction control. If you don’t mind… what’s the diff between v7.1 stage 2+ VS. v9?

Also, would you recommend the Walbro stage 2 pump over a regular one from FCP euro? I’m content with stage 2+ honestly as my Yamaha r1 is my excuse for “limiting myself on power”.

They are map versions, 7.1 is an earlier map and may be pushing the LPFP less, so you might get away with it for the time being. No harm logging both and comparing either way. I would do that with traction fully off before replacing your LPFP.

[Dave92N54]

Originally Posted by PhillyPhilly

Also, would you recommend the Walbro stage 2 pump over a regular one from FCP euro? I’m content with stage 2+

If not interested in Ethanol mixes, stock is fine. The stock pump is even good up to an E30-40 mix most times so you'd still be able to run a little if you wanted. Lifetime warranty too so, push it as hard as you want without much worry

[stewbets]

What's up with the RPM's going to zero several times? I've never seen that before.