Not wanting to start a brand war or anything. My Dodge with the 12 valve cummins grid heaters arent working. Its starting fine on these cold mornings. The farm i work for has a 1995 F-250 with the 7.3psd, and it wont start at all with out being plugged in. What im wondering is what makes some diesels start more easy then others. Thanks. I hope this is the right section but i figure yall have more diesel smarts then anyone.