Burger Tuning JB4 for Kia Stinger!

[jsrob905]

Question for those better at reading this than myself. Comparison cars are both rwd mine the first photo completely stock except jb4 denso plugs map2. The 2nd photo completely stock denso plugs map2 and aem intake .Mine seems to reach boost and then loose it more quickly than my buddies. Thoughts??

 

[Tonkabob]

Add throttle to yours and turn the phone sideways or better yet attach the log.
Looks like you are getting throttle closure on the 1-2 shift based on the boost drop and ignition spike.
Your trims are higher and i have a hunch that contributes to throttle closure.
Are you running some e85?

 

[jsrob905]

Thanks @Tonkabob in advance for your taking a look at these. I've attached two map 2 runs on 93 octain with the side view and the logs to match. In the atlanta area.

 

[Intelliburn]

Anyone know what the 0068 and 0049 codes are? I have those two CEL codes listed. Thx

 

[Terry@BMS]

Anyone know what the 0068 and 0049 codes are? I have those two CEL codes listed. Thx

You can always search them, p0049, p0068

p0049 looks like something with the wastegate connection disconnected, p0068 something with the throttle connection. If you clear them ign on, engine off, how long does it take for them to come back up?

 

[Terry@BMS]

Thanks @Tonkabob in advance for your taking a look at these.

Looks more or less as expected to me.

 

[Intelliburn]

Tha

You can always search them, p0049, p0068

p0049 looks like something with the wastegate connection disconnected, p0068 something with the throttle connection. If you clear them ign on, engine off, how long does it take for them to come back up?

I turned off the engine and the CEL was gone when I turned it back on without deleting the codes. But I went ahead and deleted them anyway. I will keep you updated on how quickly they pop back up. Thanks again!

 

[Tonkabob]

I can't see much either. The throttle close log has slightly higher fuel trims and the lean spool (high AFR in 1st gear) lasted longer into max boost. Throttle close seems more common with fuel trims over 45. Just an observation so far not proven correlation. Another user was able to stop his throttle closure by getting his fuel trims down. Less E85 in his case and he also had WMI that helped even more.
For an experiment you could try boost by gear in 1st, maybe 1 or 2 PSI reduction just to see if the trims come down and if the shift is cleaner. Do the test both ways as outside temps probably have an impact as well.

 

[jsrob905]

Thanks well do in a few days as the car is parked and covered for weather.

 

[THIC.KIA]

Had a weird feeling last night in the car and recorded this log.

I will be flashing v12 today and see if the car still feels a bit off, was curious if everything looked ok on the log.

Also was wondering if there is a guide for 'good' ranges on the gauges for the JB4 app as far as ign afr, ait, etc that we can watch to look out for anything weird.

 

[Terry@BMS]

How to read log info posted here: Kia/Hyundai JB4 Logging Parameters - N54Tech.com - International Turbo Racing Discussion

Log itself seems fairly normal. A little bit of wheel spin in the top of 1st and 2nd judging by the RPM profile in the log.

 

[Tonkabob]

Had a weird feeling last night in the car and recorded this log.

I will be flashing v12 today and see if the car still feels a bit off, was curious if everything looked ok on the log.

Also was wondering if there is a guide for 'good' ranges on the gauges for the JB4 app as far as ign afr, ait, etc that we can watch to look out for anything weird.

Yours is almost identical to my comments above. Running lean longer in 1st gear, trims above 45 and big throttle cut on the 1-2 shift. I suspect he cooler temps are making these more common. Could try to reduce boost by 1 or 2 in first gear and see if the fuel trims drop a little and if the shift cleans up. I'm curious...

 

[THIC.KIA]

Yours is almost identical to my comments above. Running lean longer in 1st gear, trims above 45 and big throttle cut on the 1-2 shift. I suspect he cooler temps are making these more common. Could try to reduce boost by 1 or 2 in first gear and see if the fuel trims drop a little and if the shift cleans up. I'm curious...

I would do that by using a different map and editing it or just editing the settings on the app?

Sorry I havent messed with too much, I generally just enjoy the car in map 2 with no issues but im down to make any changes and do a few more tests. For reference I am on straight 93 octane gas from Chevron in this tank, I saw on your other post mentioned e85 and WMI or somesuch

 

[Tonkabob]

I would do that by using a different map and editing it or just editing the settings on the app?

Sorry I havent messed with too much, I generally just enjoy the car in map 2 with no issues but im down to make any changes and do a few more tests. For reference I am on straight 93 octane gas from Chevron in this tank, I saw on your other post mentioned e85 and WMI or somesuch

Under user settings, Bottom line on the screen shot, try a 1 or 2. This is boost reduction.
If that fixes may want a back end ecu flash that can turn up fuel pressure.

 

[Terry@BMS]

View attachment 36074
Under user settings, Bottom line on the screen shot, try a 1 or 2. This is boost reduction.
If that fixes may want a back end ecu flash that can turn up fuel pressure.

His fuel pressure looks good to me. That doesn't become an issue unless you're running a heavy E85 mix with a lot of boost. The flash maps tend to make fuel pressure problems worse as the flash tuners all tend to set AFR way too rich down low.

 

[Tonkabob]

His fuel pressure looks good to me. That doesn't become an issue unless you're running a heavy E85 mix with a lot of boost. The flash maps tend to make fuel pressure problems worse as the flash tuners all tend to set AFR way too rich down low.

Yes fuel pressure is fine but trims are high. Every shift problem I've seen has high trims (roughly above 45) more than low fuel pressure.
And on map 2 and 15 psi these can't be torque limits. Seems easy test to get the trims down and see if it shifts better.

 

[Terry@BMS]

Yes fuel pressure is fine but trims are high. Every shift problem I've seen has high trims (roughly above 45) more than low fuel pressure.
And on map 2 and 15 psi these can't be torque limits. Seems easy test to get the trims down and see if it shifts better.

His trims are normal for map2 and shifting is not related to fuel trims or fuel pressure. It is related to engine RPM, and in this case you'll notice it's non-linear prior to the shift causing the dynamic boost target drop and proportional throttle response.

 

[Intelliburn]

Tha

I turned off the engine and the CEL was gone when I turned it back on without deleting the codes. But I went ahead and deleted them anyway. I will keep you updated on how quickly they pop back up. Thanks again!

I’ve been watching the P0048 and P0068 codes. While the CEL doesn’t come on the codes pop up right away after deleting them in the JB4 previous codes area. Also, my Fuel-It sensor doesn’t work right. It either reads 102 or eventually shows the correct ‘30’ mix that I have. I checked all of my connections to make sure they are secure. Any ideas of actions I might take to resolve the repeating codes and inconsistent fuel it (E85 content)readings? Thanks

 

[Intelliburn]

Terry@bms

 

[Intelliburn]

Terry@bms