Hi all, I have a 99 f250 with 212000 miles on her, and she is giving me an issue with cold engine block starting. I bought the truck 6 months ago, and have been going over it completely to try and make it a daily driver. I have replaced all 8 glow plugs (bosch) and the gpr, they are working fine. I have replaced the cps, the ipr valve, and the icp sensor, all of which needed done. I have also cleaned the tube for the exhaust backpressure sensor if that matters. The truck has all new oil and filters. The truck still refuses to start without plugging it in though, even in 65 degree weather. I am confused what to look at next. Any ideas?