Misfire at redline with +9 Flash

Civic 2016+ 1.5 Turbo
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Jamroxorz
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Joined: Tue Sep 05, 2017 1:26 pm

Misfire at redline with +9 Flash

Post by Jamroxorz » Tue Sep 05, 2017 1:42 pm

Hey. I have a 2017 MT HB Sport Touring. I've been running +9 basemap with Injen SRI. Recently while passing someone with WOTin 2nd gear, my car went into limp mode and cel came on. After pulling over and restarting, it cleared and went back to normal. I wasn't logging at the time, but later i tried recreating the event. It seems when I hit just before reline, the engine misfires throwing codes P0300 to P0304. I did more tests and the same issue happened in 3rd gear as well. I've attached my 2nd gear log to see if anyone can spot something strange in it.

car has 2350km on it
running shell v-power 91
engine is warmed up during these events
JamMisfire.fpdl
(963.63 KiB) Downloaded 39 times
misfire2.fpdl
(209.21 KiB) Downloaded 29 times
Thanks

Jun43
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Joined: Mon Aug 01, 2016 2:59 pm

Re: Misfire at redline with +9 Flash

Post by Jun43 » Tue Sep 05, 2017 1:53 pm

your fuel trim is out of whack. make sure your maf is clean and no leaks on the intake

Jamroxorz
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Re: Misfire at redline with +9 Flash

Post by Jamroxorz » Wed Sep 06, 2017 11:36 am

Here's a log with the Stock Tune Loaded - and with the Injen SRI bolted on.
injenstocktune.fpdl
(727.64 KiB) Downloaded 32 times
Here's the calibration I was using that was causing the misfires
+9revhanglimitNEW.fpcal
(9.24 KiB) Downloaded 31 times

Jun43
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Re: Misfire at redline with +9 Flash

Post by Jun43 » Thu Sep 07, 2017 9:14 am

Just a update on this. I end up tuning his AFM on it. For some odd reason his setup makes it run really rich. I tested the AFM on my car and it wasn't that badly off like his

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Hondata
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Re: Misfire at redline with +9 Flash

Post by Hondata » Thu Sep 07, 2017 10:55 am

Thanks for the update. What we have found is that without the keys that Honda places in the intake tubes to make sure they are aligned, if you assemble the intake tubes with the clamps a little different or the tube crooked then the air flow will be read differently. Not sure if that was the cause, but definitely with aftermarket intakes there is a variation of anywhere up to 30%.
Hondata

samgig
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Re: Misfire at redline with +9 Flash

Post by samgig » Thu Oct 05, 2017 9:03 am

I got the same issue..

Civic 2017 HT Sport MT 6 gears SRI Injen

Jun43
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Re: Misfire at redline with +9 Flash

Post by Jun43 » Fri Oct 06, 2017 3:56 am

samgig wrote:
Thu Oct 05, 2017 9:03 am
I got the same issue..

Civic 2017 HT Sport MT 6 gears SRI Injen
i recommend the calibration with the stock intake over Injen calibration. it seem to run rich for a lot of people. Or just get the car tuned

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Hondata
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Re: Misfire at redline with +9 Flash

Post by Hondata » Fri Oct 06, 2017 9:22 am

Yes, use the calibration for the stock intake.
Hondata

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