Thank you all for the advice.
I just did the wiggle/ tapping test while monitoring the "g/s" output on the scan tool and saw no changes in the signal. I'm going to pickup some Maf cleaner tomorrow and give it a cleaning and see what happens.
I would break out the Scope at this point & Backprobe the Signal Circuit (Yellow Wire) & observe/datalog the 0-5 volt Square Wave pattern while driving the car.
*The Frequency Increases proportionally with Air Flow!
If the scan tool data PID drops out but the Square Wave on the Scope doesn't......Suspect the Signal Circuit to the PCM for a intermittent open, Bad Connection at the PCM, Or a Faulty PCM.
*To eliminate the Signal Circuit as the problem.....Backprobe at the PCM connector & road test again.
*If drop out in Scan Data is still present & the Scope does not.....Suspect a bad connection at the PCM or a Faulty PCM.
*You can unpin the Signal Circuit from the PCM Connector & do a "Drag Test" on the PCM Terminal.....There is tool for this but I would suspect you don't have one.
If Scan Data PID AND the Scope drop out.....Suspect a faulty MAF, Intermittent loss of Power/Ground.
*I will substitute Power & Ground in situations such as this using a Replacement/Test MAF Connector.
Pink to Battery Power.
Black to good engine ground.
Unpin the Signal Circuit (Yellow Wire) & pin it into the Test Connector.
*Road test the car again.
Intermittent issues can be fun to accurately diagnose & require a process of elimination using the right equipment! Firing the Parts Cannon at it with a new MAF may be the best path for you at this point?
Intermittent signal drop out IS NOT indicative of a dirty sensor!! A dirty sensor will Under Report airflow!!