so truck sat between friday morning till monday afternoon untouched. Friday it ran perfect no problems nothing. i get home today. do some chores. replaced my wiper motor and then decided to go get gas. well truck seems to run excellent at idle but once i get up to about 30-50km/h it starts a studdering motion. and feels like it has a loss of power. i have bought brand new iridum spark plugs i will be putting in. any other thoughts?

 

Bad COP? is your service light on?

 

not sure what COP is im new. and check engine light has been on for quite a bit. but it jsut recently been acting up