Is it too rich or too lean or something else?

[brewerbry]

The fix was as simple as cleaning the old MAF and resetting the ECU. I have no idea if the new MAF was the culprit but I really do not care at this point since after cleaning and re-mapping the ECU, the car runs fine with the old MAF.

Whew, that was stressful but thankfully a simple fix.

[Pdwight]

How did you accomplish this ?

[brewerbry]

I assume you are asking about reset / remap of ECU? I disconnected the battery and left it overnight. While disconnected, I pulled, cleaned, and reinstalled the MAF sensor. I reconnected the battery, turned the key to accessory position for a minute, removed the key, waited 5 minutes, started the car, and then drove it for 10-15 miles. The car ran like garbage at 5500 rpm+ before and now it is back to normal.