I have changed the sensor and the plug for the MAF. The filter is clean, as well as no debris in the intake piping.

What is next? Any help is greatly appreciated.

Also, here is a list of the things that have been done since I bought the car:
timing belt/water pump replacement
ps pump replaced
evap vent solenoid replaced
rear pads replaced
valve and gasket replaced
lower timing cover replaced
new cam seals
reluctor wheel replaced
full ac replacement
alignment
new serpentine belt
new intake filter
new rad cap
new cabin filter