different wideband readings
different wideband readings On the dyno my car was tuned to ~12.8 a/f. I installed a PLX wideband last week and have noticed that under WOT its reading ~13.5-14.0 on the street. Is it common to see this?
It's common for AFR to be lean in lower gears because
the actual air is always "ahead" of the measurement
that drives fueling. Dyno is in higher gear and maybe
a slower run-up in RPM.
There's also a lot of potential for discrepant instruments,
especially if you have a ground offset problem as many
"hobby" widebands do (anything where cig lighter is the
-assumed- reference ground, will be skewed by some
amount while a self-powered wideband that's independent
of the vehicle electrical system, should not).
the actual air is always "ahead" of the measurement
that drives fueling. Dyno is in higher gear and maybe
a slower run-up in RPM.
There's also a lot of potential for discrepant instruments,
especially if you have a ground offset problem as many
"hobby" widebands do (anything where cig lighter is the
-assumed- reference ground, will be skewed by some
amount while a self-powered wideband that's independent
of the vehicle electrical system, should not).
