2015 f150 5.0 exhibiting problems. Could a restricted vacuum line such as the one in these photos be a culprit to off and on issues? I was having major issues camping and having no idea what it was I decided to fix this hose in camp with what I had on me hoping it would help obviously a crappy fix. The diameter of the hose is too small restricting vacuum. Could this be the reason for my poor shifting along with other issues? The symptoms I'm having change every time I drive the truck. It mostly runs bad and will only run perfect usually once a month is all. A vacuum leak or restriction would cause it to never run good? I ask because Ford didn't see an issue with it or I think they would have brought it up.