Hello everyone I am looking for any insight. I have a 1973 Cougar XR-7 with a 351C. It was running fine but out of the blue it will start when cold and then fast idle at around 1200 to 1500 RPM. I can let it run at fast idle for a few minutes but as soon as I tap the gas to get it to stop fast idling the RPM’s drop and then the engine dies. After that I can’t get the engine to restart. I’ve been toying with the idea of replacing the gas tank (which I suspect is long overdue) along with a new fuel pump but I don’t know if that would have anything to do with this. I wouldn’t think so as it will start cold and fast idle for a good bit before it dies. Thanks as always for any ideas!