JB4tech.com - International Turbo Tuning Discussion
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Prune Prune is offline
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Default 2013 550i - 12-27-2021, 02:39 PM

Hello, I have a 2013 550i with 28k on it. I have WMI, intakes, *********, and JB4. I am getting a misfire on cylinder 4 only at higher RPM, with the wmi disabled the jb4 seems to be doing its work well. Is there a way to get rid of the wild throttle cuts between shifts and the slow to rise throttle opening on this platform?
Attached Files
File Type: csv First log.csv (6.0 KB, 61 views)
File Type: csv WMI pull.csv (4.6 KB, 60 views)
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Terry @ BMS's Avatar
Terry @ BMS Terry @ BMS is offline
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Default 12-27-2021, 05:51 PM

What is the WMI setup? Don't see it setup in the JB4 settings.


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Prune Prune is offline
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Default 12-28-2021, 03:39 AM

The first log is without the wmi. The wmi kit is from burger. Please detail any other setup necessary as I put in minimum flow 40, signal scaling 60, minimum boost of 9.0 psi. I see flow being sensed on my hand held.
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Default 12-28-2021, 08:28 AM

Oh OK, I didn't notice the settings were changed from first log to second. Grab a longer WMI run, like 40-90mph on a safe private track, so I can get a better idea of what boost is doing exactly.


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
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