engine hesitates on exceleration and will randomly misfire every so often. The codes I read are PO102 MAF or VAF circuit low input. 5000 miles ago I but on a new MAF sensor and replaced the K&N filter with a paper one. Just fixed the oil pan leak. Atlantic British suggests it is the MAF causing my problem. Could this be bad again or should I look elsewhere.

 

How many miles on the truck, when was it tuned last and what year is it?