How to measure AFR?
#1
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I'm curious to see my air-to-fuel ratio since I've done a few mods (10% pulley, and 3.5 inch intake). Does anyone know how to see your AFR in real time? I have a Bluetooth OBD-II scanner and use Torque (Lite) app to view the info on my phone. Has anyone been able to do this on an app with a bluetooth OBD-II scanner? Would you say that it is accurate?
Thanks.
Thanks.
#2
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With a digital meter on the return signal back to the ECU you should see 0.50 volts DC going toward 5.0 on throttle up . On a graph you can see the flowrate ( specific to each MAF sensor ) There is one for the X300 .
On the ELM327 based devices the MAF is sometimes off by a factor of 10 or 100 .
At idle for a 4.0 liter engine at 650 RPM should read 4.0 grams / second ( seems low to me )
On the ELM327 based devices the MAF is sometimes off by a factor of 10 or 100 .
At idle for a 4.0 liter engine at 650 RPM should read 4.0 grams / second ( seems low to me )
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WaterDragon
XJ XJ8 / XJR ( X308 )
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08-29-2013 02:38 PM
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