Incorrect AFR at WOT Help!!

FoMoCoSHO · July 27, 2015, 09:42:35 PM

Quote from: kskrew4life on July 27, 2015, 04:29:33 PM
Quote from: SHOdded on July 27, 2015, 12:05:12 PM
Excellent idea! Wait till you feel the SHO has settled back into the stock tune, then datalog.

How long do you think the ECU takes to relearn after a flash?

I can tell you the trims like 45 min to an hour minimum.

glock-coma · July 27, 2015, 10:09:17 PM

Not sure if this helps, but this is what was posted some time ago here.

FoMoCoSHO · July 27, 2015, 10:15:07 PM

The torque obd drive cycle widget will tell you when its complete iirc....

kskrew4life · July 27, 2015, 10:38:13 PM

Quote from: glock-coma on July 27, 2015, 10:09:17 PM
Not sure if this helps, but this is what was posted some time ago here.

GREAT Thanks! this will definitely help.. it seems if all steps arnt completed in the same session it gets interrupted and starts over.. i was logging some data earlier.. this probly explains why it looks so screwy.

kskrew4life · July 27, 2015, 10:40:53 PM

Quote from: FoMoCoSHO on July 27, 2015, 10:15:07 PM
The torque obd drive cycle widget will tell you when its complete iirc....

I have the Torque OBD app, didnt know there was a drive cycle widget. I will look that up, that could come in handy whenever i flash a new tune.

FoMoCoSHO · July 27, 2015, 10:47:02 PM

I think its called the status monitor.....

When you press and hold for the add gauge function, scroll through all your options and I think it's in there....

kskrew4life · July 27, 2015, 11:01:43 PM

i found two widgets one says "Drive cycle status since DTC clear" and "Current Drive cycle status" thanks for pointing this out

kskrew4life · July 28, 2015, 01:51:12 PM

i captured a WOT session with the stock tune... the afr numbers look really off.. can someone confirm if i need to replace both o2 sensors based on this log? i still dont feel anything unusual with the car im at a lost whyt eh readings are so off,

SHOdded · July 28, 2015, 02:00:11 PM

You mean the lambda numbers? Those are afr as a percentage of stoich for your fuel. For example 14.7 for gasoline. So lambda of 1 would be equivalent to afr of 14.7.

Havent looked at the two most recent logs yet. In the midst of an emerrgency system rebuild.

kskrew4life · July 28, 2015, 02:21:40 PM

Quote from: SHOdded on July 28, 2015, 02:00:11 PM
You mean the lambda numbers? Those are afr as a percentage of stoich for your fuel. For example 14.7 for gasoline. So lambda of 1 would be equivalent to afr of 14.7.

Havent looked at the two most recent logs yet. In the midst of an emergency system rebuild.

Yes i was looking up a lambda conversion chart but there was no entry above 1.405 lambda which translate to 20.66 afr... the last log is showing max at 2.00 !! with an average of 1.2.. those are really high values yet there is no check light, no knock, nothing out of the ordinary as for as driving.

FoMoCoSHO · July 28, 2015, 02:43:36 PM

Kscrew, that is where you lifted and the car went into decel fuel cutoff which is normal.

FoMoCoSHO · July 28, 2015, 02:45:29 PM

You will also see high numbers as you transition in and out of that mode as well......

FoMoCoSHO · July 28, 2015, 02:46:23 PM

What are you logging with?

kskrew4life · July 28, 2015, 02:55:15 PM

Im using the SCT x4 device with the liveLink Gen-II. Torrie said both sensors in the log were not responding correctly, I have no idea what is going on

kskrew4life · July 28, 2015, 03:03:58 PM

Quote from: FoMoCoSHO on July 28, 2015, 02:43:36 PM
Kscrew, that is where you lifted and the car went into decel fuel cutoff which is normal.

Thats a relief, i was kinda worried about that. thanks for explaining that