CasperGT2
New Member
- Joined
- Jan 20, 2026
- Messages
- 2
- Reaction score
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- Points
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2020 KIA Stinger GT2
Here are my specifications:
- K&N CAI
- MBRP catback exhaust
- DC Sports Mid pipes
- Single ADD W1 Catch Can
- JB4 with EWG wires and fuel wires (JB4 was recently installed on January 31, 2026)
- Brand new ignition coils
- Brand new HKS plugs gapped to 0.022
- I only use 94 octane or 93, no lower
- Running MAP 1
I spoke to Terry at Burger Motorsport, and honestly, he wasn’t very helpful. He was extremely vague and told me to change FF from 50 to 30. All his emails were also vague and didn’t provide much help in diagnosing my issue. So, I’m reaching out to you all to see if you can assist me.
I want to avoid going to a dealership and fix it myself if possible.
For a while now, I’ve been experiencing issues where, around 2,000 rpm or a little less, the car would randomly enter some type of limp mode or protection mode. It barely allowed me to accelerate, even if I floored the gas pedal. Additionally, it would display a CEL. When I scan the car right when it comes on, no errors are shown. Even after turning the car off and on in accessory mode, as recommended, there are still no errors. However, when I turn the car all the way over, the engine light goes off, and everything returns to normal until it happens again.
I read that changing the ignition coils and spark plugs should fix the issue, but it didn’t. I changed both together and gapped the plugs (0.022).
Now, I’m undergoing some testing, and Terry told me to adjust the FF/Wastegate from 50 to 30. That seemed to help quite a bit because it was happing more frequent if I remember correctly! However, I can still get it to happen if I do a spirited drive, then slow down to come to a stop. Then, I accelerate normally, but if I take my foot off the gas pedal to slow and and let the RPMs drop to around 2,000 rpm or a little lower, and then accelerate normally to get the car to move forward more, the car will cut a lot of power. This results in a CEL, forcing me to pull over, turn the car off, and then turn it back on again.
I’ve tried recreating it by getting to those low rpms without accelerating hard beforehand, but I couldn’t reproduce the problem.
Today, I tested again, but this time I set JB4 to map 0. I drove for an hour, spirited here and there when I could and testing it often as I lowered the rpms to around 1,500-2,000, trying to recreate the issue. However, it didn’t happen once. Everything felt fine and as it should.
I need your input on this. Is there a setting in JB4 that I can adjust to help more?
The settings in JB4 were actually set as recommended on the website where I purchased the EWG wires. Here are the settings I have set to:
- Duty Bias: All to 50
- FF/Wastegate: 30 (was set to 50)
- PID gain: 20
- Auto shift reduction: 60
I was able to log it one time when I sent it to Terry. Not sure if it helps or not. But it did happen when I was logging. He wasn’t clear from this log what the issue is…
Here are my specifications:
- K&N CAI
- MBRP catback exhaust
- DC Sports Mid pipes
- Single ADD W1 Catch Can
- JB4 with EWG wires and fuel wires (JB4 was recently installed on January 31, 2026)
- Brand new ignition coils
- Brand new HKS plugs gapped to 0.022
- I only use 94 octane or 93, no lower
- Running MAP 1
I spoke to Terry at Burger Motorsport, and honestly, he wasn’t very helpful. He was extremely vague and told me to change FF from 50 to 30. All his emails were also vague and didn’t provide much help in diagnosing my issue. So, I’m reaching out to you all to see if you can assist me.
I want to avoid going to a dealership and fix it myself if possible.
For a while now, I’ve been experiencing issues where, around 2,000 rpm or a little less, the car would randomly enter some type of limp mode or protection mode. It barely allowed me to accelerate, even if I floored the gas pedal. Additionally, it would display a CEL. When I scan the car right when it comes on, no errors are shown. Even after turning the car off and on in accessory mode, as recommended, there are still no errors. However, when I turn the car all the way over, the engine light goes off, and everything returns to normal until it happens again.
I read that changing the ignition coils and spark plugs should fix the issue, but it didn’t. I changed both together and gapped the plugs (0.022).
Now, I’m undergoing some testing, and Terry told me to adjust the FF/Wastegate from 50 to 30. That seemed to help quite a bit because it was happing more frequent if I remember correctly! However, I can still get it to happen if I do a spirited drive, then slow down to come to a stop. Then, I accelerate normally, but if I take my foot off the gas pedal to slow and and let the RPMs drop to around 2,000 rpm or a little lower, and then accelerate normally to get the car to move forward more, the car will cut a lot of power. This results in a CEL, forcing me to pull over, turn the car off, and then turn it back on again.
I’ve tried recreating it by getting to those low rpms without accelerating hard beforehand, but I couldn’t reproduce the problem.
Today, I tested again, but this time I set JB4 to map 0. I drove for an hour, spirited here and there when I could and testing it often as I lowered the rpms to around 1,500-2,000, trying to recreate the issue. However, it didn’t happen once. Everything felt fine and as it should.
I need your input on this. Is there a setting in JB4 that I can adjust to help more?
The settings in JB4 were actually set as recommended on the website where I purchased the EWG wires. Here are the settings I have set to:
- Duty Bias: All to 50
- FF/Wastegate: 30 (was set to 50)
- PID gain: 20
- Auto shift reduction: 60
I was able to log it one time when I sent it to Terry. Not sure if it helps or not. But it did happen when I was logging. He wasn’t clear from this log what the issue is…
