Right now it's idling wierd. Up and down . I know it's the harness because the idle changes when you squeeze the harness. Last time I was having this issue it was also stalling, played with the harness just by moving it and the idle stabilized and was good for 2 weeks until today. Ford did the wiring harness recall for the previous owner 3 years ago. The harness is extremely hot I think the heat is affecting it. Would the rubber insulation found on water pipes and AC units withstand the heat under the hood?