how do you test mass airflow, o2, and map sensors?

Question

got multimeter, power probe, one regular test light and one testlight w/ polarity

Answer 1

map sensors are check most of the time by checking freq output while apling "mg wich is subject to change by manufacturer. O2 are easy but you dont say how many wires your o2 has. if you have a 1 wire sensor the one lead goes to ground and the other to the wire on the o2 sensor. if you have a 4 wire then put the leads on the 2 wires for the sensor the other 2 will be for the heater circuit. put the meter on dcv and should swich .1-.9 dcv with the car running and should have a good swich rate. Mass sensor http://www1.autozone.com/az/cds/en_us/0900823d/80/04/fa/92/0900823d8004fa92/repairInfoPages.htm

Answer 2

Get the factory service manual for your car. Should have all that in there. Typically, if your mass airflow is hosed, car idles rough and won't go above 20-25mph regardless of the throttle input.

O2 sensor being bad will mostly just cause a decrease in MPG.

Not sure what would happen with a bad map sensor.

Answer 3

The decrease numbered codes are frequently replaced first and then appropriate codes will some situations disappear.sounds like a MAF sensor is improper.the two you could reason stalling .It became my experience on my Buick Park Ave.,the stalling became brought about by utilising the MAF sensor.to study yours ,basically unplug the MAF sensor and force.as a results of fact the computor has a returned up for the MAF sensor if the difficulty has then been eradicated,replace the MAF sensor.

Answer 4

With a diagnostic computer.
You can buy one for about $35,000.