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2mchboost 2mchboost is offline
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Default Misfire/cutting out. Plz take a look at log. - 07-11-2019, 07:32 PM

Hello, I have a 2017 440 running 91 octane and a catalyst ******** with a stage two tune. Everything is on default settings. Things have been working fine for the last three or four months, then today I noticed there was what seems to feel like spark was being blown out and the car misfire. It was approximately 89į out. attached I have a log of an instance in which Iím talking about. The misfire was in second gear and pretty obvious so I laid off the throttle. Please let me know what your thoughts are based on the logs and any other info.

Thanks!
Attached Files
File Type: csv 2019-07-11 19_12_10_Map-2 2.csv (66.8 KB, 37 views)
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2mchboost 2mchboost is offline
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Default 07-11-2019, 07:38 PM

Im sorry, that should real ******* ********.
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2mchboost 2mchboost is offline
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Default 07-12-2019, 01:52 PM

Another log from today. Only mod is VRSF meow-less.

Should I Be changing any settings on the jb4? They are all on default. I have the optional ewg hooked up. Should I Be adding a couple gallons of E85?

Thanks for the input !
Attached Files
File Type: csv 2019-07-12 13_39_21_Map-2.csv (116.9 KB, 31 views)
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JBoe JBoe is offline
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Default 07-14-2019, 10:24 PM

Looks like you're still on older firmware. You should update to V13... It's in the BEF thread's first post. Also since you have EWG, but aren't in need of it on Map 2, try setting all to 50. That's the same as zero/stock.

It looks like your settings aren't all at default. Boost safety should be 26, 3rd gear limit is set to 0.6?? You should make that zero. Since you don't have the Fuel Harness you can put that(FOL) to zero as well.

Try those changes and put FF back to 50. Then relearn through a few pulls and let's see where it settles. It's down to 1 in your log so no adaptation range is really available.

My .02
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2mchboost 2mchboost is offline
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Default 09-05-2019, 09:44 PM

Quote:
Originally Posted by JBoe
Looks like you're still on older firmware. You should update to V13... It's in the BEF thread's first post. Also since you have EWG, but aren't in need of it on Map 2, try setting all to 50. That's the same as zero/stock.

It looks like your settings aren't all at default. Boost safety should be 26, 3rd gear limit is set to 0.6?? You should make that zero. Since you don't have the Fuel Harness you can put that(FOL) to zero as well.

Try those changes and put FF back to 50. Then relearn through a few pulls and let's see where it settles. It's down to 1 in your log so no adaptation range is really available.

My .02
So I havenít used the back end flash feature. I simply have the stock jb4 tune in stage 2.

I just verified tonight that throttle closes to 40 on wot and fluctuates drastically. I read somewhere terry mentioning that you can tune out throttle closures via EWG adjustments. Can someone plz chime in to verify?

Thanks!
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2mchboost 2mchboost is offline
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Default 09-05-2019, 11:01 PM

So I was under the impression that flashing to a different firmware reset your settings for some reason, but obviously as the previous poster mentioned settings are definitely not default. So I updated to v14 firmware and set all settings back to defaults. I went and drove around for a bit to get the jb4 to learn. I noticed that I wasn’t able to make over 2 lbs or boost for some reason. I pulled over, turned the car off and back on, then it was making normal boost. After some pulls, I noticed the car still had the major throttle closure. For reference, only mods are the VRSF meow-less, fuel and ewg wires. I attached a log, so hopefully someone can chime in.
Attached Files
File Type: csv 2019-09-05 22_35_56_Map-2 2.csv (22.2 KB, 13 views)

Last edited by 2mchboost; 09-05-2019 at 11:10 PM.. Reason: Added info
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fuzzywuzzy987 fuzzywuzzy987 is offline
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Default 09-06-2019, 10:07 PM

I'm not an expert by any means but it looks to be over boosting. I would recommend trying map 6 absolute at 15 and go from there. Also log in 3rd or 4th gear, 2k to redline. Timing doesn't look great but the log isn't that great either due to the shift mid way. What kind of fuel?


2017 M240i / 6MT / EWG Wires / BMS Air Intake / Dinan midpipe / 200cel d0wnp1pe / 93 Octane
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2mchboost 2mchboost is offline
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Default 09-09-2019, 08:33 PM

Hereís a better log. Running 91 octane and Map 2. Next step going map 6 but I just wanted to see how the jb4 was correcting. What kind of boost levels should I be aiming toward on 91?
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File Type: csv 2019-09-09 20_04_36_Map-2.csv (28.8 KB, 18 views)
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JBoe JBoe is offline
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Default 09-09-2019, 11:09 PM

You're timing is low and FOL is high at 60. Our cars like fuel, but they need Octane. Looks like map 2 is it for you right now and even that looks a little on edge. Some have been able to get map 3 with 91, but I never could. You could try map 6 and push higher in .5psi increments.

Best advice, if you want more, is to get the Octane higher. Then timing should come in better and you'll have more power on map 2. Otherwise, it's investment time... Lol. (WMI, CPI, Flash, etc.)

I'd also add, since you have EWG connected, set all you bias to 50 across RPM range. Right now, you don't need EWG modified so 50 puts you at stock control. EWG mods seem to only be needed for WMI, Turbo Swaps, Bigger Boost Targets, etc. You're not at that level yet.

Last edited by JBoe; 09-09-2019 at 11:15 PM..
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2mchboost 2mchboost is offline
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Default 09-10-2019, 07:26 AM

Quote:
Originally Posted by JBoe
You're timing is low and FOL is high at 60. Our cars like fuel, but they need Octane. Looks like map 2 is it for you right now and even that looks a little on edge. Some have been able to get map 3 with 91, but I never could. You could try map 6 and push higher in .5psi increments.

Best advice, if you want more, is to get the Octane higher. Then timing should come in better and you'll have more power on map 2. Otherwise, it's investment time... Lol. (WMI, CPI, Flash, etc.)

I'd also add, since you have EWG connected, set all you bias to 50 across RPM range. Right now, you don't need EWG modified so 50 puts you at stock control. EWG mods seem to only be needed for WMI, Turbo Swaps, Bigger Boost Targets, etc. You're not at that level yet.
So is the low timing the reason for the throttle being pulled? Should I be adding a couple gallons E85 to the tank? I read terryís post somewhere that the throttle issues could usually be fixed via ewg settings? Iím trying to get it to be nice and stable so maybe I should be lowering boost a tad.
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B58_M240 B58_M240 is offline
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Default 09-10-2019, 12:56 PM

Quote:
Originally Posted by fuzzywuzzy987
I'm not an expert by any means but it looks to be over boosting. I would recommend trying map 6 absolute at 15 and go from there. Also log in 3rd or 4th gear, 2k to redline. Timing doesn't look great but the log isn't that great either due to the shift mid way. What kind of fuel?
This is the same path I took. Tried to run MAP2 and had zero timing and major closures. I switched to MAP6 and have managed to dial-in 16psi, eliminated the break-neck closures and have brought timing up. I have EWG and FF wires and have experimented quite a bit. One significant factor was the addition of octane booster. I run Shell 93 (US) and still saw a lot of timing improvement.
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JBoe JBoe is offline
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Default 09-10-2019, 03:00 PM

Quote:
Originally Posted by B58_M240
This is the same path I took. Tried to run MAP2 and had zero timing and major closures. I switched to MAP6 and have managed to dial-in 16psi, eliminated the break-neck closures and have brought timing up. I have EWG and FF wires and have experimented quite a bit. One significant factor was the addition of octane booster. I run Shell 93 (US) and still saw a lot of timing improvement.
Our cars need Octane for sure. To me, the cooling system/intercooler can't handle higher boost's heat load very well either. That's another reason why chose to go with both an Octane booster and WMI. I hover between 19-20 psi with good timing. It's FUN!
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