Long crank 4.2L

[randyjaneway]

I am working on a 2000 F-150 with 4.2L engine that has a long crank after 1-2 hours of sitting following a drive cycle. Plugs are new, fuel pressure is within spec. It starts fine cold, sitting less than 1 hour or more than 2 hours. I am in Southern California. Any experience with this scenario? Any ideas? Please help.

 

[CaFordDude]

Welcome aboard. I'm sure someone that knows what they are doing will be along to help.

 

[blacksnapon]

I am working on a 2000 F-150 with 4.2L engine that has a long crank after 1-2 hours of sitting following a drive cycle. Plugs are new, fuel pressure is within spec. It starts fine cold, sitting less than 1 hour or more than 2 hours. I am in Southern California. Any experience with this scenario? Any ideas? Please help.

Any smoke when it finally starts? It may have fuel pressure meeting pressure specs, but how long does it hold it when you turn off the key? It should hold for 3-5 minutes. If not, leaky injector(s), regulator,fuel pump, lines.

 

[randyjaneway]

long crank

Fuel pump has been replaced twice. If it sits over 2 hours it starts right up. Pressure does hold, by the way.

 

[d-kuzmen]

Hows the coolant level? Possible coolant leaking into the cylinders giveing a long crank, hows it run when it starts any smoke color?