P0102 Chevrolet - 1500 express 4.3 2002

Question

how much amp's / volts run thru the maf ? and can you test it to see if it's bad, how ?
thanks nek

Answer 1

P0102 MAF airflow circuit low input

If the vehicle is idling  rough  or is hesitating you can disconnect the MAF if the condition improves this just prove you have a failed MAF sensor. The MAF sensor is a frequency generator, You would have to measure its frequency which is the yellow wire , with the KOEO (key on engine off) the frequency start out high then drops to 300 HZ. With Key on Engine running  at idle the frequency should be about 2.3 Hz.With no load increase the RPM to 2500. the frequency should be about 4.2 Hz.