Hey guys, I gots me an AirDog II 165. I installed it back in September and have been with this quirk since then. I'm not sure if it is a problem or anything but just wanted to see if others experience this?I got my fuel pressure at 20psi according to my fuel pressure gauge. When I start the truck and the grid heaters kick on, the fuel gauge will go down to 15-16psi. When the grid heaters switch off, the fuel jumps back up to 20 psi. I have watched the fuel in the line move back and forth to the gauge as they switch on and off.Its a mechanical gauge with a cage protector in between the stock fuel filter housing and gauge.WOT never shows fuel pressure to be lower than 15psi on the gauge.

Ok, so mine is hooked to the batt. I may not be from Missouri but your going to have to shom me. What is the PDC box

Ok, so mine is hooked to the batt. I may not be from Missouri but your going to have to shom me. What is the PDC box

Here you go... PDC (Power Distribution Center) notice my accessories are tied to the postive battery lead. Take notice there is isn't any wires hanging off my terminals...

Does anyone know of any drawbacks in connecting the AD to the alternator?

None... Other that you got more strung around the engine than I do...

My cowl is rather full with my stuff.