Engine works fine until warms up or does highway speeds, it has power issues when getting up to speed, then begins to stutter a more and more, and starts stalling. Eventually, it will just start stalling if you are idling or slowing down to coast/park/reverse. Put over $1,400 into the engine, and now starting to replace each valve, cap, etc individually... nothing works so far.

Had the stinkin truck for 5 years now and every winter if the truck isn't warmed up(160+) it will just shut right down when givin it fuel. Sometimes just driving down the road it will start bucking like it's not getting any fuel. Have talked to others with the some problem but no solutions.