My Airdog 150 has approximately 85k and has run great until a few days ago. The pump is running very loud similar to a FASS. It can be heard easily inside the cab. Now the truck is loping at idle on all DSP tunes. FRP, FPRV and balance rates are normal. No spare filters on hand so I drained water separator and other filter. No leaks, not losing fuel, and fuel is returning back to tank. Only other time I've heard Airdog run loud is when its' sucking air (ran out of fuel). I've completely filled the tank and it lopes at 36 degrees outside and 70 degrees so I know it's not from cold temps and bigger injectors.
Anyone ever had an Airdog run very loud and loping?
Thanks
Anyone ever had an Airdog run very loud and loping?
Thanks