Originally Posted by BroganF150
well when ever i go about 55 60mph and i just coast the rpms drop and it feels like it is lagging power . i found a vaccum line that was in bad shape and i replaced it and the truck has been doing fine but it started again so i was just going to replace all them and if i had a diagram it would make it easier but i guess ill just do it the hard way
All the vacuum lines are preformed so you will have to get them from the dealer. Just go to the parts counter and order the lines and replace them 1 at a time.
If you have a 5.4 you could be experiencing a low grade misfire and replacing the COPs would fix that. I would recommend replacing the plugs too.