JB4 possible overboost issue

[AdrianG]

Hey guys, going to more or less copy/paste an email I sent over to the guys at BMS.

2022 Stinger GT2, AEM intakes, JB4 installed with fuel wires & EWG running on Map 2, 91 octane. I initially ran Map 1 for a short period of time with zero issues, figured I would test Map 2 out since others reported having good results running Map 2 on Costco 91, seems to do pretty well for the most part.
Anyhow, in the past 24 hours I have ran into an issue a couple times that resembles overboost; essentially complete cutoff of boost until restart, but no CEL is displayed. I am not sure if this is some safety feature programmed into the JB4, or if it's the vehicle itself causing this. Some issue on the JB4 app is preventing me from reading codes whatsoever, ie. 'invalid read'. Attempting to capture logs seems to be resulting in limited information, but I'll try again shortly. Also, while using the app, the gauges aren't constantly or consistently displaying current info, mostly in regards to the RPM and possibly IAT. This morning I adjusted the FF to 45 and experienced the aforementioned condition once since then.

 

[General_Vodka]

Idk about your issue but Costco 91 is not a good fuel. It's probably the most watered down 91 you can buy lol.
Have you checked your jb4 connections? Seems like there may be a communication issue.

 

[cncBilly]

Hey guys, going to more or less copy/paste an email I sent over to the guys at BMS.

2022 Stinger GT2, AEM intakes, JB4 installed with fuel wires & EWG running on Map 2, 91 octane. I initially ran Map 1 for a short period of time with zero issues, figured I would test Map 2 out since others reported having good results running Map 2 on Costco 91, seems to do pretty well for the most part.
Anyhow, in the past 24 hours I have ran into an issue a couple times that resembles overboost; essentially complete cutoff of boost until restart, but no CEL is displayed. I am not sure if this is some safety feature programmed into the JB4, or if it's the vehicle itself causing this. Some issue on the JB4 app is preventing me from reading codes whatsoever, ie. 'invalid read'. Attempting to capture logs seems to be resulting in limited information, but I'll try again shortly. Also, while using the app, the gauges aren't constantly or consistently displaying current info, mostly in regards to the RPM and possibly IAT. This morning I adjusted the FF to 45 and experienced the aforementioned condition once since then.

When adding the EWG’s do you adjust the app settings. I didn’t at first and your issue sounds familiar however I got a code or two.

 

[AdrianG]

I looked at them extensively just the other day after install, checked them again yesterday, albeit not quite as extensively. Not sure how you figure Costco 91 isn't quality, it is considered top tier, and it's not as if there are huge variations in quality of gas from one company to the next, the company would be actively tampering with the octane if doing anything other than adding detergents, for the most part.

Idk about your issue but Costco 91 is not a good fuel. It's probably the most watered down 91 you can buy lol.
Have you checked your jb4 connections? Seems like there may be a communication issue.

 

[AdrianG]

When adding the EWG’s do you adjust the app settings. I didn’t at first and your issue sounds familiar however I got a code or two.

I left the settings at the recommended/automatic settings. I've only adjusted the FF this morning.

 

[cncBilly]

I looked at them extensively just the other day after install, checked them again yesterday, albeit not quite as extensively. Not sure how you figure Costco 91 isn't quality, it is considered top tier, and it's not as if there are huge variations in quality of gas from one company to the next, the company would be actively tampering with the octane if doing anything other than adding detergents, for the most part.

You should go on youtube and check out VanCityAudi. He compares various fuels on a dyno same day same car and the results are eye opening. Your above opinion will change.

 

[AdrianG]

You should go on youtube and check out VanCityAudi. He compares various fuels on a dyno same day same car and the results are eye opening. Your above opinion will change.

I'll see if I can find something like that, the only ones I see so far are comparisons between different shell options, E85 vs 91, 87 vs 91, etc. Not a direct comparison from one company to the next or anything along those lines, it appears. Also, they seem to be in Canada, which I've heard Canadian gas tends to be of inconsistent quality.

 

[AdrianG]

Just an update in regards to my comment about reading codes and capturing logs, it appears that the pins were slightly deformed inside the connector, sorting that out solved the problem. Attaching a picture sent to me by BMS

 

[Terry@BMS]

Email me if you end up needing any tech support on it...

 

[AdrianG]

Email me if you end up needing any tech support on it...

I appreciate your help, it looks like you got me all squared away via email. Thanks, Terry.