The other day I went to start my 1997 ford f250hd 7.3l 193,000 miles, in the morning and it would crank but not start. The temp was about 64 degrees. I got a p0380 and p0381 code. Later in the day it warmed up to about 80 and it started. I changed out the gpr and that disnt seem to fix it. It would not start even when it was warmer out. An i had just driven it. Instead I heard the IDM relay clicking rapidly when I turn the key to the on position. Not sure where to go from here? Should I test the glow plugs? I checked the batteries and they had 13 volts. In installing and removing the new GPr. The gpr I got was a cheap one. I bought a white Rodgers an look to install that one. Since I over tightened one of the connections and cracked the cheap one. Not sure where to go with this next. Not sure why when I changed the relay it made it worse. And why it made the idm click rapidly.