Air/Fuel Ratio

[mdsbch]

Does anyone know how to figure out what the air fuel ration is, using information from an auto x-ray diagnostic tester on an 85 vette? Is there a formula using MAF (gr/sec) and the injector pulse width (mS)?

Mike

 

[WhalePirot]

You may be able to convert it directly from the oxygen sensor's voltage, rather than compute an estimate from the MAF and the injector info. The ECM strives to attain 14.7:1, based upon oxy sensor input.