My 95 psd was cranking realy slowly last week when I parked it ( I drive a company truck 5 days a week) sunday night, but pluged it in just to see if it help the problem out. Thinking that maby if it was warm it wouldn't sutch a drain on the glow plugs no sutch luck, but it still started. I went out to dinner and when I came out it just bearly started so I droped off the gf. I made another stop on the way and it just started. When I got home I had to do some truck shuffling and a friend shut my truck off and it would not start we trying useing my work truck which is a 02 F-450 tow truck and even with the cables and a booster pack it was a no go, so we rolled it down the hill and it fired. So I guess my question is any ideas on what it could be other than my alt ? for batts I run 2 red top optimas, can't remember which ones they are but their the bigger ones. Any help would be great.