Data logger for P01 and P59

[bubba2533]

No they are both the from the same memory address, so both are likely AFR. I'll do some more digging to see what I can find.

I don't see any PID listed in that link. Can you point me directly to the post with PID info?

[bubba2533]

I found EQ ratio. Was faster than I thought, but knowing that I was looking at AFR helped.

22FC22 should be EQ ratio

[aaronc7]

Good work! I'll test it out in a bit.

Yeah the PID list is kinda hidden: https://github.com/joukoy/UniversalPatcher

It's part of the XML_v3.2.zip file.

I converted into a simple spreadsheet to make viewing easier for me--attached.

It looks like the whole FC series is still unexplored.

[Stokes1114]

It seems EQ ratio is working on my flex truck, just not sure of the formula yet. Also in fuel temp it seems byte b is where the info is located. Gonna mess with it more later today.

[aaronc7]

Here is the equation for EQR.

[2 byte data] / 1024.

14.7 / EQR if you want it in gas scale.

Here's an example during engine warmup

[Stokes1114]

What app are you using in that screenshot? Trying to set eqr up in torque pro and not having much luck. Have you messed with fuel temps formula?

[aaronc7]

Racechrono Pro, track day app. I just prefer the interface most for testing.

For torque use Auto for OBD header and don't include the 01 at the end of the PID.

I have fuel temp saved but haven't messed with equation yet. I noticed it was a 2 byte param, but I also notice that in EFI Live it's only a single byte/channel ... So you you be right about it only being the B byte. I'll give it a go soon. With it being so hot I can't get a good temp variance to really test it yet.

[Stokes1114]

Aaron, Have you had much luck with any PIDs? I have tried many different formulas for ASpark and fuel temp, but can't really come up with anything that seems to work right. They're definitely both 2 bytes.
Seems fuel temp should be ((a*255)+b)-40
ASpark possibly (A)/40.96)+B
As I understand it ASpark should be a value 0-1 to show which way it's leaning towards high octane vs low octane tables. Which at times I get mostly 0.4, but if I get some KR it moves and sometimes shows xxx.4. Not sure why it would be showing in the hundreds.
On EQ ratio I get a steady 1.1 with 2.7% ethanol fuel. But, when I hit PE it drops to 0.9. I was thinking it should be the opposite of lambda? May have the formula messed up.

[aaronc7]

I've been slacking on the fuel temp and other new ones.

Yeah that should be the correct equation for EQ ratio.

Should be a steady 1.0 in closed loop regardless of ethanol content, unless you're specially targeting richer and running open loop all the time. Mine seems to be working correctly just based on a quick test idling.

[jlvaldez]

aaronc7, I saw you post on the race chrono forums about supportin VPW stuff for C5s. I made the post about gettign the brake pressure working. I should add the PIDs i've got for steering angle sensor and brake pressure.