Test the TPS with an ohmeter (ign off) or voltmeter (ign on), looking for smooth change in values as the throttle is moved. voltages are 0.4-1.0v, resistances are 3.5K-6.5K ohms.

No clue on testing the MAF. Its a Karmann vortex generator type, which uses an ultrasound beam to "count" the vortices generated in the air flow, and the number of vortices is proportional to air flow. The ecu reads the frequency of the detector to get the air flow, and I gues you'd need a Mitsu "multi-use tester" or a frequency counter to test it. I'd hit the junk yards and try to find a 3.0 air can.

Also remember most of these problems are not with the sensor itself, but with the wiring and harness - clean the terminals good and reset the ecu by disconnecting the battery - for 15sec., and retest.....