I've had this problem for 2 years and now just finally trying to resolve it.
2012 F550 Super Duty shuttle bus, V10 6.8L gasoline. 53K miles.
It will crank forever and not start. Sometimes it will start after a minute of cranking, if I hit the gas pedal. Once it starts, it seems to run well and drive well. Especially on higher octane.
Once it starts the first time, it will easily start each consecutive time that day. If it seats overnight, back to square one of no-start.
I did some research, read that it's the fuel pump. Got some help replacing the fuel pump with a lot of difficulty, (cracked connectors, spliced hoses).
It's not the fuel pump. New fuel pump does the same thing. Did not make a whit of a difference. No start. I am getting frustrated.
My next idea it's for sure the plugged up fuel filter. Except I can't find it anywhere on the rail on the driver's side. Following the fuel line up and down, no fuel filter. I don't know where it is, maybe the PO deleted it.
I need someone with really strong diagnostic skills. What else could it be? Fuel pressure regulator? If so, *where* is it located, because I cannot find it anywhere on the fuel line and I crawled everywhere under it. This is not some plain-jane F550, this is a long shuttle bus.
Injectors failing? Strange, at only 53K miles.
I think starting fluid makes some difference but it's hard even with the starting fluid.
2012 F550 Super Duty shuttle bus, V10 6.8L gasoline. 53K miles.
It will crank forever and not start. Sometimes it will start after a minute of cranking, if I hit the gas pedal. Once it starts, it seems to run well and drive well. Especially on higher octane.
Once it starts the first time, it will easily start each consecutive time that day. If it seats overnight, back to square one of no-start.
I did some research, read that it's the fuel pump. Got some help replacing the fuel pump with a lot of difficulty, (cracked connectors, spliced hoses).
It's not the fuel pump. New fuel pump does the same thing. Did not make a whit of a difference. No start. I am getting frustrated.
My next idea it's for sure the plugged up fuel filter. Except I can't find it anywhere on the rail on the driver's side. Following the fuel line up and down, no fuel filter. I don't know where it is, maybe the PO deleted it.
I need someone with really strong diagnostic skills. What else could it be? Fuel pressure regulator? If so, *where* is it located, because I cannot find it anywhere on the fuel line and I crawled everywhere under it. This is not some plain-jane F550, this is a long shuttle bus.
Injectors failing? Strange, at only 53K miles.
I think starting fluid makes some difference but it's hard even with the starting fluid.