Air Dog Question

[windrunner408]

Hey guys so I have installed this AD150 and have about 320 miles on it so far and it seems to be running like a top. I do have a question though. Before I had this pump, I have always filled my tank to the cap of the filler neck. I was wondering since I have the air return line to the tank tapped into the filler neck, is it ok to still fill the tank to the cap?? I would think that the air return line would fill up with fuel and be forced back to the tank and I didnt know if this would harm the pump. Any ideas??

[2003kingranch]

I've never thought about it. Subscribed.


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[GoFastPadre]

Originally Posted by windrunner408

Hey guys so I have installed this AD150 and have about 320 miles on it so far and it seems to be running like a top. I do have a question though. Before I had this pump, I have always filled my tank to the cap of the filler neck. I was wondering since I have the air return line to the tank tapped into the filler neck, is it ok to still fill the tank to the cap?? I would think that the air return line would fill up with fuel and be forced back to the tank and I didnt know if this would harm the pump. Any ideas??

I have the Air Dog 2 and I fill mine to the top of the neck every time I fill up. Had it for 3 yrs now with no issues. Hope that helps.

[windrunner408]

Yes it does. Thanks man. I never saw anything saying not to do it but just thought I would ask.

[shu873]

I have a 150. Fill it up as full as you want. It's coming out of the return under pressure so there's no issue.

[windrunner408]

Cool. Thanks man.

[HeavyAssault]

+1 with the above posts. The return line is under pressure and will not be effected by the fuel in the fill line. Drive 20-30 miles and that fuel will drop below the return line splice.

[PGreenSVT]

Originally Posted by GoFastPadre

I have the Air Dog 2 and I fill mine to the top of the neck every time I fill up. Had it for 3 yrs now with no issues. Hope that helps.

The AD 150 and the AD II are different evidently. My AD II taps into the return line from the oem fuel can/fpr not the vent line in the filler neck.

[Term3]

Originally Posted by PGreenSVT

The AD 150 and the AD II are different evidently. My AD II taps into the return line from the oem fuel can/fpr not the vent line in the filler neck.

That's the way I have mine set up since getting to filler neck is a PITA on an Ex.

[PGreenSVT]

The AD II comes with a hardline with a U in it that basically sits in place of the hfcm in the return line and the other leg connects the AD II. You can see it in this pic. It is on the right just above the red loctite package. The U faces the tank and the single leg the engine. Top straight segment goes into the oem return line using the connections that used to plug into the HFCM. The bottom connnects to the return port on the AD II.