Did you use an OE MAF?

Check for air leaks in the various vacuum lines.

Do a glove test to see the health of your PVC system.

Clean the MAF connector and test for Air leaks in the intake system. P0101 Possible source Air leakage in the intake system Contact resistance or oxidation in the mass air flow (MAF) connectors Damaged mass air flow (MAF) sensor. Blocked intake system P0102 Possible source Air leakage in the intake ...