I recently went thru the ranger due to some idle issues. I reset the base voltage on the TPS and then set the idle. Changed the Tbap harness and removed the exhaust manifold to find that the gasket was shot and it had a leak. I also replaced the exhaust doughnut and springs. It now flashes HOT across the display if it just sits and idles for a few min or so. Anybody have any experience with this? Just wondering where to start. The exhaust manifold still leaks due to a crack at the weld, I plan on fixing that and didn't know if it is related somehow. Thanks for any input!