View Full Version : AFR 63.99 Why?
GTOken
April 2nd, 2010, 09:31 AM
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
April 2nd, 2010, 10:19 AM
Might be the wrong AFR pid... there are several different ones...
What year/model vehicle, and which ECM...?
mr.prick
April 2nd, 2010, 10:21 AM
Is this commanded AFR or actual?
GTOken
April 2nd, 2010, 10:50 AM
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
April 2nd, 2010, 11:12 AM
Try {GM.AFR} and/or {GM.EQUIVRATIO}
GTOken
April 2nd, 2010, 11:18 AM
Try {GM.AFR} and/or {GM.EQUIVRATIO}
When I try to add either of those it says they are invalid PID's.
mr.prick
April 2nd, 2010, 11:41 AM
If you have already validated all PIDs select them anyways then see if they become valid
after connecting to the vehicle.
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