AFR 63.99 Why?

[GTOken]

My first attempt at scanning. I was successful at scanning and adjusting the CMPRET so I feel good about that. But, the AFR seem to stick out like a sore thumb. I know it should be around 12~14:1. What things would cause the scanner to read 63.99? thanks.

[joecar]

Might be the wrong AFR pid... there are several different ones...

What year/model vehicle, and which ECM...?

[mr.prick]

Is this commanded AFR or actual?

[GTOken]

I was looking at the AFR on the Dashboard (& graph). It flips from zero to 63.99. I just added PID AFR_B (looks to be Commanded) and it sits on 14.7 and does not change.

My vehicle is a 2000 GMC K2500 L31 5.7L with original ECM. I just modified engine with ZZ4 cam, Edelbrock E-Tec 170 Heads, Edelbrock headers, injector spider upgrade.

[mr.prick]

Try {GM.AFR} and/or {GM.EQUIVRATIO}

[GTOken]

Try {GM.AFR} and/or {GM.EQUIVRATIO}

When I try to add either of those it says they are invalid PID's.

[mr.prick]

If you have already validated all PIDs select them anyways then see if they become valid
after connecting to the vehicle.