when i replace the mass air flow sensor do i need to reset the computer?

 

Always a good idea when you replace a part for performance. If it a strait replacement it shouldn't matter.

As a side note I tend to get 8/10 of a mile better fuel economy on average after resetting my computer for about 2k miles. Don't know why but my MPG records have showed this trend on my 99 Lariat.

T