Monitor the MAF voltage directly from the MAF plug. If it is like the 97 era cars it will swing from 0 = no air flow to nearly 5 VDC at max flow.

Sometimes unplugging the MAF will result in a better running engine if the MAF is failing low.

Also, the 97 cars had 2 power feeds. A 12 VDC for the hot film circuit, and a 5 VDC to power the signal out circuit.