I have a 1999 e 350 ambulance with a 7.3 diesel motor it was running great it died out on me and i have not been able to get it to start i checked all the fuses witch were good changed the computer glow plug relay. Im getting fuel and oil but it just cranks no start no smoke the wait to start light comes on and goes off like it should.I cleaned the battery cables too. Im stomped and have no clue what else to do.im not sure if i posted this in the right spot im new do this. thanks for and help or ideals

 

You may want to re-post in the F series Section under Diesel, but I would recheck the glow plugs. How long does the light stay on before it goes off so you can try to start it. If it's only like 5 to 8 seconds, more than likely in this cold weather, your plugs are weak. I had to turn the key off and back on about 3 times before mine were hot enough to spark the fuel, I changed them the following spring. Also are you sure your injectors are actually opening? Just cause you have fuel at the rail don't mean it's going through the injectors.