Define "new one"
Did a "new one" come with the CAI ?
You should always use the original MAF when you install a NW CAI on an NA.

maxchicon and I installed my single CAI ( second hand, got it from a guy in San Diego ) at his home in Auburn, I immediately drove home ( 70 miles ) and had no issues at all.
That was 4 years ago, no issues since.