Page 1 of 1
Crazy A/F ratios causing fuel cut like symptom
Posted: Sat Oct 10, 2020 10:02 pm
by DMKDC5
Car is a 2004 RSX-S
Mods: RBC intake manifold, Hybrid Racing CAI, Ktuned 72mm TB, Megan shorty header, Hondata V4, Hasport mounts.
In the datalog you can see right at 2min 20seconds when I go WOT, the A/F ratios start spiking like crazy and it causes a fuel cut like symptom.
No codes are stored and no MIL comes on. Anyone seen this before? or has any tests I could run to help diag? Thank you in advance.
Re: Crazy A/F ratios causing fuel cut like symptom
Posted: Mon Oct 12, 2020 3:17 am
by DMKDC5
Sorry! forgot this info~
Car: US 2004 DC5-s
KPRO: KRPO V4
Software version: V4.4.3.0
Build: Windows 10
ECU Part Number: dont have available atm, will get it asap
Calbration: Attached
Got Kpro from church automotive in socal
Re: Crazy A/F ratios causing fuel cut like symptom
Posted: Mon Oct 12, 2020 9:55 am
by Spunkster
You are decelerating at 2:20 and it is completely normal for the AF ratio to go full lean at this time.
Re: Crazy A/F ratios causing fuel cut like symptom
Posted: Mon Oct 12, 2020 11:18 pm
by DMKDC5
Sorry, im talking about the spiking in A/F at WOT around 2:25-2:30. I uploaded a screenshot where you can better see what im talking about.
Capture.PNG
Re: Crazy A/F ratios causing fuel cut like symptom
Posted: Tue Oct 13, 2020 9:00 am
by Spunkster
Those are between shifts when you are letting off the throttle.
Re: Crazy A/F ratios causing fuel cut like symptom
Posted: Tue Oct 13, 2020 9:56 am
by DMKDC5
Capture_LI.jpg
Im talking about these zones, not where selection line is
Re: Crazy A/F ratios causing fuel cut like symptom
Posted: Wed Oct 14, 2020 8:09 am
by Hondata
It is something to do with the way you have remapped the fuel table rpm index and then difference between the low and high speed fuel tables. Look at the fuel injector change at VTEC and how leans it runs at VTEC on the high cam.