Not starting

[Ragindirt]

2010 871, 719k on it, T800, still has mandate on truck.

My truck has been parked for 3 weeks now ( she usually is down this time of year for a bit). Usually fire truck up every weekend but with the recent snow storms I haven't made it back home for the last month long enough to give her a look over.

No faults, turns over, just not firing over. Sounds like the clickaty click goes through its cycle fine and primer ( lift pump) is running; but doesn't have the sound of before where it changes pitch. Truck has never lost her prime after sitting for awhile.

"I have even had to change fuel filters in the middle of nowhere without filling filters, and she started after 5 or so start cycles before I rolled over".

Any thoughts if primer pump has given up the ghost, or any other thoughts. Will replace filters today and dig into a few other possible issues.

Thinking back on this two months ago headed to haggs ( before I turned around and came home), engine light coming on, no power, looping on the governor- and at operating speed.

Fuel pump?