2000 ford f350 hot shot advice

6 years ago I had an F350, Wouldn't start below 50 degrees Fahrenheit. I googled f350 wont start below 50 degrees.

Got all sorts of forums telling me it's the glow plug relay.

Went to Chief Auto and bought one. Put it in. Still wouldn't start below 50 degrees.

Took it to a ford dealer, $2,500 later they said they replaced the glow plug relay and the batteries, starter and cables.

Still wouldn't start below 50 degrees. I sold it on craigs list, specifying that I would only sell it to a mechanic. 4 hrs later a mechanic calls me and says buys and rebuilds the 7.3 motors and he comes up and spends 20 minutes trying to start it.

Then he says, wait a minute .... he turns the key and it makes the usual click noise after 1 second. He then smiles and says I know the problem. He then buys it.

3 hrs later he calls me and tells me why it didn't start.....

The starter solenoid and the glow plug relay look identical and are often mixed up by parts stores and even dealers. The only way to tell the difference .....

Turn the key, if you hear the click within a second or two, that means they sold you a starter solenoid instead of the glow plug relay. A glow plug relay makes the click noise after 9 or 10 seconds.

The glow plug relay has a chip in it that lets it deliver electricity to the glow plugs for 9 or 10 seconds to warm the glow plugs allowing them to be hot enough to ignite the diesel fuel.

 

I would stay away from hauling cars, too much weight. I had 576,000 miles on my original engine hauling light. I replaced the long block I now have 667,000 miles on the truck. I just assume from the picture at the beginning of the thread you are thinking about doing cars. Long term with that F350 light weight freight is going to give you a better ROI. You will always be competing against the trucks that can carry twice as many cars as you can. If you want to do cars, Big Truck, Big Trailer IMHO