Attention: TDR Forum Junkies 
I decided to install an AirDog to maybe head off an LP issue. FP gauge indicated about 6-7 psi@highway speeds w/wo a load. I liked the idea of more filtration in line too.
The truck has about 65,000 miles on it right now.
I left the factory fuel filter in place. I had previously installed a Vulcan big line kit from the filter canister to the VP.
The biggest difficulty I encountered was building the PushLok fittings. A little oil on them didn't seem to help. I ended up heating the fuel line in hot water and got fairly good results. The "two barb" PushLoks were by far and away the easiest to work with. The two "three barb" PushLoks I got for the ball valve I installed between the fuel tank and the AirDog were SOB's. I could not get either past the last barb. (Initial road test showed no leaks though. )
I used a big pair of scissors to press down the tabs on the fuel tank supply line fitting and was able to remove it fairly easily. (Remember to remove the blue plastic piece left over on the fuel tank fitting when the connector is removed. )
The fuel tank fitting connector that came with the kit had a 1/4 NPT fitting on it and the PushLok connector that was intended to connect it to the fuel line was a 3/8 NPT. A trip to Ace for a reducer fixed that issue.
The road test indicated about 14 psi at idle and cruising. Hard acceleration would drop it about 1-2 psi but quickly returned to 14. Hard acceleration previously (with a 4K boat in tow) would tickle 5 psi, especially up a hill.
I bumped the starter a coupla times and then started the rig up. No problems. Test drive was uneventful. No leaks detected anywhere. I used Loctite #2 nonhardening sealant on all NPT connections.
I am monitoring fuel pressure at the VP input.
The job took me about 7 hours working solo.
The mounting hardware for the fender flares on a dually hurt when you lean back against them.
The truck has about 65,000 miles on it right now.
I left the factory fuel filter in place. I had previously installed a Vulcan big line kit from the filter canister to the VP.
The biggest difficulty I encountered was building the PushLok fittings. A little oil on them didn't seem to help. I ended up heating the fuel line in hot water and got fairly good results. The "two barb" PushLoks were by far and away the easiest to work with. The two "three barb" PushLoks I got for the ball valve I installed between the fuel tank and the AirDog were SOB's. I could not get either past the last barb. (Initial road test showed no leaks though. )
I used a big pair of scissors to press down the tabs on the fuel tank supply line fitting and was able to remove it fairly easily. (Remember to remove the blue plastic piece left over on the fuel tank fitting when the connector is removed. )
The fuel tank fitting connector that came with the kit had a 1/4 NPT fitting on it and the PushLok connector that was intended to connect it to the fuel line was a 3/8 NPT. A trip to Ace for a reducer fixed that issue.
The road test indicated about 14 psi at idle and cruising. Hard acceleration would drop it about 1-2 psi but quickly returned to 14. Hard acceleration previously (with a 4K boat in tow) would tickle 5 psi, especially up a hill.
I bumped the starter a coupla times and then started the rig up. No problems. Test drive was uneventful. No leaks detected anywhere. I used Loctite #2 nonhardening sealant on all NPT connections.
I am monitoring fuel pressure at the VP input.
The job took me about 7 hours working solo.
The mounting hardware for the fender flares on a dually hurt when you lean back against them.
Last edited:
