air dog fuel pressure problems...HELP

nussbaumkade · 01-08-2011, 02:15 AM

i have a 01 cummins 5 spd air dog 2 edge att with juicer striaght piped...the other day my fuel pressure went to 0...i thought i was jelling but i have went 200 miles no problem.when i turn the key on it goes to 1 then back to 0 when i start it...i run 700egts doing 60 on leval 1 and when i get on it the boost goes to 15 +, whats going on here...thanks guys

johnnybots · 01-08-2011, 02:36 AM

first off if you have 0-1 psi i would not even start my truck. you will be doing more harm than good to the precious vp44 injection pump. have you listened for the sound of the pump running before start up? have you checked fuses? how low is the fuel in your tank? is the fuel pressure gauge F'd up? is the CEL on?

nussbaumkade · 01-08-2011, 03:08 AM

i have not looked at fuses ill check in morning...the tank is full.. i use to hear it turn on but its been windy and cold.ill do some checkin...what cell do u mean?i am new to all this..i hope its just a fuse...what does the big rubber washer do that air dog sends with there pump? thanks

johnnybots · 01-08-2011, 03:15 AM

CEL = Check Engine Light. Big rubber washer? how big are we talking about? is it maybe one of the filter gaskets? do you have the draw straw set up? it could be the one to seal the hole you drill in the tank for draw straw. Whatever you do don't run the truck until you verify it is getting over 10psi of fuel. VP44 (injection pump) is real pricey you don't wanna have to buy one.

nussbaumkade · 01-08-2011, 09:48 AM

no check engine light on.and i have the system where the probe drops into the tank.i checked the fuse today but couldnt hear the pump turn on? its a big rubber washer pry 2in by 2in looks like a filter washer.

nussbaumkade · 01-08-2011, 12:39 PM

i for got to add when they put the air dog in i believe they said they ran it through my stock lift pump...

f44life · 01-08-2011, 01:25 PM

Quote:

Originally Posted by nussbaumkade

i for got to add when they put the air dog in i believe they said they ran it through my stock lift pump...

well thats your problem right there. Your supposed to bypass your stock pump so it goes one line out of your vp44 down to your frame rail into your airdog then line to your gas tank.

Push fuel through them small stock hoses and threw your stock pump will definately cause low psi. So you need to double check what the f they did or post pics. I definately would not drive it or your going to be spending 1100bucks on a vp44.

johnnybots · 01-08-2011, 01:27 PM

assuming you checked the airdogs fuse. you should also check the fuse for the stock fuel system. the stock system is tied into the new airdog system it triggers it to turn on. Have you used a voltmeter before? if all fuses are good, you will need to check if the airdog is getting 12v. its possible the airdog is broken if you don't get 12v.

nussbaumkade · 01-08-2011, 11:23 PM

i have used a voltmeter do i just test the air dog fuse?or do i test the stock lift pump to?if so how do i test it...the air dog is only 3 months old..

f44life · 01-08-2011, 11:45 PM

the stock connecter for the stock lift pump is supposed to be unplugged and that connecter is ran to the airdog

nussbaumkade · 01-09-2011, 01:37 PM

ok there is a plugg in by my air dog with nothing pulgged into it.has been that way since i got it put on .there is another plugg in that is connected.. i was told to take the hose off coming out of the air dog off to see if it will pump fuel,,,good idea or not?bad filters wouldnt do this would it?

nussbaumkade · 01-09-2011, 01:41 PM

the truck use to run 14-17[psi then it started running 12-13 psi a week ago or so...i figured cold weather slowed my pump down...was that the start of a bad pump?