I keep hearing people say to block the EGR in my Patrol, then I hear other people say not to. I am about as un-mechanical a person as you could get and was wondering, do all cars have an EGR, or only diesels, or only Patrols? Are the EGR problems exclusive to just Patrols or all other cars? For instance, should I block the EGR on my ford ranger well as my Patrol? Does my ranger even have an EGR?