Mass air flow sensor?
#2
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
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