Lack of power, P0101 MAF and an occasional P0300 random misfire.....replaced the MAF and it didn't fix the problem.

Any suggestions?

CHeck fuel pressure and leakdown rate: Key on, engine off, fuel pump running: Must be 60psi to 66psi. Pressure must remain above 55psi for 3 to 5 minutes after the pump shuts off. Also check spark plugs, distributor cap, rotor, and spark plug wires. Post your results.