7.3 must be plugged in to start
For a full year now. I have been having to keep my 2002 7.3 plugged in before starting. If it is 90deg out I'm usally ok but will still run ruff for 5 to 10 min. If it gets below 70deg, if its not plugged in for more than an hour, it takes for ever befoe starting. If its 50deg and below, must be plugged in for at least 2 hours.
I have replaced glow plug relay, glow plugs, starter, alternator, fuel filter, air filter... Dont know the issue. I thought it might be a fuel problem and have been running fuel additive every so often thinking I have a stuck injector or something with no luck... Some one mentioned possible high pressure oil pump...Any suggestions??