that screen on the bottom pops off and under that I think there is a small flapper just like what our trucks canister...from what it looks like the jeep canisters flapper is opened up by the engines return fuel.you guys worry to much...lol

 

... says the guy who's had his box off (how many times?) for further experimenting¿

 

I have had my bed off 3x and the 3rd time was the charm...I am getting GOOD I can have the whole bed off in 10 mins easy!!...lol...seriously tho my newest mod is the winner IMHO

 

Well, until I find the time to get my AD150 installed, I'll still read to figure the best way to keep my OEM pump in there so it can be reconnected for that just in case thing in the bushes.

 

I've read somewhere the CP3 will suck past the AD if it stops working..?

 

I don't know if you read some other post as well, but I said that in the modded jeep liberty module thread here

https://www.dieseltruckresource.com/...=189220&page=2

and if you don't feel like clicking the link this is what I said "I disabled the Airdog150 and the cp3 was able to get 7.5 psi on its own so even if the airdog fails it's all good"

and also in this thread

https://www.dieseltruckresource.com/...d.php?t=198516

"And just so you know if you are thinking about a backup pump or something my cp3 was able to pull through the airdog.....I tried it. I was able to get around 7.5 psi. Now if the pump did fail it might be that you have to pull the lift pump relay fuse or kill the fuse to your trigger wire to allow the cp3 to pull through the pump. Something like that."

 

I will not say you're wrong, but I'm suspicious of the pressure thing. If the CP3 was pulling fuel between itself and the AD, with your fuel pressure sensor in between, shouldn't pressure be zero or negative as it would be creating a vacuum on the system between those two points? Think about it in the same context of sucking on a straw in a thick milkshake.

Is it possible it was a negative 7.5 psi vacuum on the line for the CP3 to draw fuel through the AD and tank, but the gauge not capable of showing a negative value, was actually showing it to be a positive value?

I have no doubt that the CP3 can draw fuel, but from there to get fuel all the way from the AD and tank, there would have to be suction on the line in order to draw fuel. To me, you can't have positive pressure unless a pump is pushing. It just defies all laws of physics.

 

I read this the other day and have been thinking about it off and on and I don't know what to tell you. I looked up vacuum on wikipedia.....my lord researching on wikipedia is just as bad as here. You can do it forever!

Again what you're saying sounds right, but I did what I said and it was reading pressure/vacuum. It was somehow reading on that gauge. AD 150 was disconnected and the stock in-tank lift pump was replaced with the jeep liberty fuel module. Only way to get a reading was from the cp3. ???

Somebody who's smart will know. Hopefully they will share with us

 

I thought about it long and hard before I even posted said thoughts.

This is all I know for sure:

1) I haven't had time to do mine yet.
2) How I'm going to do it and retain my OEM pump in the tank......I'm not sure.
3) Pressure readings will be better than stock.

 

Some good points, kinda thing that makes a guy go, "HMMMMMM"


BTW, you going with an AD100 Festus?

 

I was saying hmmmmm for days while I was trying to figure out the how and the why

 

AD150 is sitting in my basement Fisherguy. I can't seem to get more than a hour or two to myself. After working out of town for ten of the past twelve years, my time has been consumed by getting some projects around the house done first. Now that I'm working in town and home every night, it feels more like home than just a place to store stuff. I can see the light at the end of the tunnel though.

Once I start, I do want to finish!

 

I ran my truck down to the low fuel light came on, I had a 5gal fuel can with me just in case. truck never missed a beat. I do not have a fuel pressure gauge in my truck at this time, but after I installed my A/D 100 I had my shop gauge on the truck for appx 2 weeks, the gauge would fluctuate 4-6 psi below 1/4 tank but the pump never changed tone as if it were running out of fuel, and it always ran consistently, wot or at idle. A/D 100 has been in for a few months now with the draw straw, still quiet as a church mouse, engine still running smoother and quieter, I am very pleased with their product.

I Have been watching all the modifications with the factory fuel pump canisters and the liberty canisters, and *****'s and Sandaholic have done some very clean professional mods to their set-ups, (cudo's to both). For those who want to leave the factory lift pump intact (for just such an occasion) then the draw straw is still a viable option. I ran the feed line from the A/D to the factory ff canister, (as shown in the pics), I plugged and taped and zip tied the factory fuel supply line out of the way, the banjo bolt was cleaned and both sealing washers oiled and placed in a zip lock bag and stored in my truck box. If the need ever arose I can place the factory lift pump back in service in less than 15 minutes on the side of the road. My truck will never be modded heavily, an updated Quad ZXT is all it will ever have, so just food for thought.

Tim

 

I'm ordering the 150 next week and will follow Mark's lead with the canister mod but will be bugging him for more advice.

My biggest fear now is the possibility of fuel leaking past my new fittings in the top of the canister when I fill up cuz, with the vent mod I've already done the fuel will be higher in the tank than the top of the canister.

I wish there was something better than just the o-rings the draw straw and return line fittings go through, or maybe some gunk I can add to seal things up.

Also, it I was to undo the feed to the CP3 or to the filter canister and attaching a hose, would I be able to turn the key and pump all the fuel out of the tank before dropping it?

 

You can do that but you will have to keep cycling the key.
If your going to drop the tank anyway then pull the fuel fill hose and just put a 6' section of hose in through the inlet and siphon the fuel out that way. Just push the hose in as far as you can without dropping it in the tank, then hold you thumb over the opening in the hose and draw the hose out quickly into a bucket then release your thumb, it will flow right out.


Tim