My trucks been down for 3 years, I started it today it fired up after a longer the usual cranking time , I let it run for an hour, shut it down then started back up no delay instant fire up, I let it sit an hour then go to start and it does the extended cranking again I assume its a low HPOP oil level issue creating the extended cranking, question is shouldn't the HPOP fill its self back up after a 1 hour run time?

 

Ipr O rings or stuck ipr.

 

Did you check the hpop level it will fill up within a couple seconds of running

mine sat for about a year and a half before I bought it after driving it a few times it fired up instantly probably just has some air to work out

 

Year model of truck ?

 

97 F-250 XLT, SC ,Short box 4X4, 5 Speed,

 

Let it sit over night and check the oil level in the hpop reservoir. It should be within a 1/2" of the top