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nebraskaStinger nebraskaStinger is offline
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Posts: 1
Join Date: Mar 2020
Car: 2018 Kia Stinger GT
Exclamation Cylinder misfire after 3000ish RPM - 03-26-2020, 04:49 PM

This is for my 2018 Kia Stinger GT. I can't do pulls at all, the car shudders and then goes into limp mode. Checking the engine codes, I'm getting cylinder misfires.

I have the JB4 with fuel control and I have the OBD connected. Currently running Map 0 as I haven't had a chance to swap out the spark plugs, but I did run Map 1 for a few pulls with no issues previously.

For other mods, I have BMS Intakes, BMS Pedal Tuner, Jun Bl down-pipe, and Borla exhaust.

The misfiring issue seems to have started happening after the Jun Bl down-pipe install (about a week ago). Before that I had no issues, so I'm looking for assistance. This might not even be a JB4 issue, I don't know.

I don't have a good log for when the cylinder misfire happened, but I did attach 3 other logs I was running at I was driving around normally after the down-pipe install. And also attached is an image of the error codes.

Attached Images
Attached Files
File Type: csv 20200323_1724_runs(1).csv (169.4 KB, 1 views)
File Type: csv 20200326_1815_runs(1).csv (318.6 KB, 0 views)
File Type: csv 20200326_1726_runs(1)_part1.csv (289.3 KB, 0 views)
File Type: csv 20200326_1726_runs(1)_part2.csv (256.8 KB, 0 views)
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1st timer 1st timer is offline
Junior Member
Posts: 69
Join Date: Jul 2019
Car: 2015 Kia Optima turbo
Default Yesterday, 06:41 AM

Just a thought....did you reset the ecu?
Maybe it needs to go through a re-learn period???

2015 Kia Optima SX-T
Mods: ultimate racing strut bar, JB4 set at map1, HKS
M40XL plugs, cpe bellmouth, injen intake ,Forge BOV, catch can.
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stock_stinger stock_stinger is offline
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Posts: 10
Join Date: Jul 2019
Car: 2019 STINGER
Default Yesterday, 07:48 PM

id guess plugs off the bat, even if it had worked prior. stock plugs are poo
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