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JB4 Misfires

Messages
1
Reactions
0
City
Aurora
State
IL
Country
United States
What I Drive
2019 Kia Stinger GT
#1
Hello all,

I’ve had the JB4 on my 2019 Stinger GT for about 15,000 miles now. Car is at 21,000. I haven’t ran into issues until recently. At high RPM, I’m getting misfires and loud pops from my exhaust.

I usually just run 93 octane.

- 15,000 miles on performance plugs
- Borla Catback
- BMS Intake

I’ve tried running it with tuner turned off and still having the issue at full throttle.

Today I wanted to log it, so I did on Map 1 and no issues. I tried Map 2 and it misfired in 1st & 2nd at top RPM again. I have logs too, but says I can’t upload CSV?

Any help? @Terry@BMS

Thanks,

Steve
 

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