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13 SI stock equivalent running rich

Posted: Wed Sep 07, 2016 7:43 am
by 9thgensi
Hello,
I recently put a completely stock k24z7 in my 13 SI. Original motor was modded and blew up. Can you please review these data logs to if the car is running normal / safely? I noticed the A/F would drop into the 10's while getting on it.

US 13 SI stock equivalent with misfire disabled (due to lightened flywheel from previous setup)

Datalog 9-6-2016-004:
- Car had 20 miles since flash
- SOCAL, 74 Degrees fahrenheit 200 ft above sea level.

Datalog 9-7-2016-001:
- Car had 20 miles since flash
- SOCAL, 62 Degrees fahrenheit 200 ft above sea level.

Thanks!
datalog-13-SI-Stock-Misfire-disabled-9-7-16-001.fpdl
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Re: 13 SI stock equivalent running rich

Posted: Wed Sep 07, 2016 7:56 am
by Hondata
It is rich at cruise, lean around 4000 rpm and then rich at rpm increases. It needs tuning.

Re: 13 SI stock equivalent running rich

Posted: Wed Sep 07, 2016 8:37 am
by 9thgensi
Thanks for the prompt reply. Would the ECU learn and self correct over time I've noticed that effect traveling out of state with the car? bad plugs? Im just puzzled since it's stock.

Re: 13 SI stock equivalent running rich

Posted: Wed Sep 07, 2016 3:07 pm
by Hondata
The ECU has an overall fuel trim which compensates to some degree. The biggest variable on all the AFM vehicles is the AFM. Any replacement intake will put the lambda way out, and even a stock intake can misread the air if the intake tubes are not assembled in the exact stock orientation. eg if one tube is clamped to the other crooked then the AFM misread the air. Fortunately the stock intake is alignment cutouts and lips to ensure correct orientation.