Need airdog help.

weekendwarriorfsw32 · Jul 18, 2013

Well I was hopiing that this pump would have done better then this but its not. Installed it with 190/75 injectors and at first it was perfect held pressure. 100 miles later the pressure dropped to around 50 from the set 60 and if you barley got on it would drop to say like 25 if I kept my foot in it. So I called airdog and they sent out a new pump, just the motor not the whole base. Went to start it up and its acting the same way, it's at 50 and if I get on it at all it drops. So I turned up the regultor on the pump till it was at 65 psi from 50 and went to drive it and same story, I get on it and it drops like a rock to around 35 and you can feel the power drain from it. So what else can I do? I know it was able to keep up with it at first so what happened? What else should I check? Drop the tank and look at the pick up tube if it's clogged? Filters on the pump? Any help is greatly appreciated. I am supose to drag race tomorrow at the Riffraff East event but need to get my fuel pressure back into check. This is a Airdog II 165.

fordfreak4life · Jul 18, 2013

guess I should have sent my a1000 with you.... check your wiring, if you are using the airdog wiring it's subpar at best, seen plenty of them melted

Sent while spinning 18 wheels

amarillo250 · Jul 18, 2013

like said abouve the wiring is weak and on a side note, I hat 4 ad2 before I got the aeromotive and the pressure never dropped below 58 from 60

JGman141 · Jul 18, 2013

weekendwarriorfsw32 said:
Well I was hopiing that this pump would have done better then this but its not. Installed it with 190/75 injectors and at first it was perfect held pressure. 100 miles later the pressure dropped to around 50 from the set 60 and if you barley got on it would drop to say like 25 if I kept my foot in it. So I called airdog and they sent out a new pump, just the motor not the whole base. Went to start it up and its acting the same way, it's at 50 and if I get on it at all it drops. So I turned up the regultor on the pump till it was at 65 psi from 50 and went to drive it and same story, I get on it and it drops like a rock to around 35 and you can feel the power drain from it. So what else can I do? I know it was able to keep up with it at first so what happened? What else should I check? Drop the tank and look at the pick up tube if it's clogged? Filters on the pump? Any help is greatly appreciated. I am supose to drag race tomorrow at the Riffraff East event but need to get my fuel pressure back into check. This is a Airdog II 165.

I've ran into the same issues with mine as well. It idles at 55psi and if I go WOT I'm lucky to have 40psi. I've tried almost everything people have said to do but I'm just going to bit the bullet and get a whole new setup. I would just crank it up to 70 and hope it holds.

weekendwarriorfsw32 · Jul 18, 2013

I just don't get it because it did originally hold pressure then it was like some one snapped there fingers and now it doesn't hold at all even with a new motor. Going to pull the regulator out of the pump and see if the o-rings are messed up at all.

Spoolin' · Jul 18, 2013

same problem. about 57 at idle drops immediately to 20 psi at WOT

weekendwarriorfsw32 · Jul 18, 2013

So a lot of people are having issues with holding pressure then? I always thought it was with them dying.

05wh250 · Jul 18, 2013

Mine was the opposite it held 90 psi all the way to work one morning. After that it came off for the a1000

JGman141 · Jul 18, 2013

weekendwarriorfsw32 said:
So a lot of people are having issues with holding pressure then? I always thought it was with them dying.

The biggest issues with the airdog are the pumps dying and the fact that you still use factory lines from the fuel bowl. If you had a full rr it might help keep pressure up because you would have more volume of fuel in the heads. I'm planing on throwing a rr on soon and I might see if it helps but it will eventually get replaced with an aeromotive 1000 and I might use the airdog to feed the a1000

weekendwarriorfsw32 · Jul 18, 2013

I have a full regulated return on my 6.0.

JGman141 said:
The biggest issues with the airdog are the pumps dying and the fact that you still use factory lines from the fuel bowl. If you had a full rr it might help keep pressure up because you would have more volume of fuel in the heads. I'm planing on throwing a rr on soon and I might see if it helps but it will eventually get replaced with an aeromotive 1000 and I might use the airdog to feed the a1000

1fastTRX · Jul 19, 2013

weekendwarriorfsw32 said:
I just don't get it because it did originally hold pressure then it was like some one snapped there fingers and now it doesn't hold at all even with a new motor. Going to pull the regulator out of the pump and see if the o-rings are messed up at all.

I would say check the regulator. I noticed with mine there is a lot of "dead area" in the adjustment. I bought viton orings from harbor freight to replace the ones in the regulator, but have been too lazy to do it. If you're using the stock wiring at least shorten the ground wire to something near the frame. Current draw reduced by over 1 amp. A quick snip, strip, and self tapper.

01PSD · Jul 19, 2013

They're piles of turd. H&S just put one on their 6.7.... How long you think it's gonna maintain the higher pressure of the 6.7 LPFP? Lmao

weekendwarriorfsw32 · Jul 19, 2013

I am sorry what first hand experience do you have? I think it will last just fine on those because of the fact it only has to move 10 psi, just like my 6.4's that has been flawless, but thanks for your help...... Not

01PSD said:
They're piles of turd. H&S just put one on their 6.7.... How long you think it's gonna maintain the higher pressure of the 6.7 LPFP? Lmao

01PSD · Jul 19, 2013

weekendwarriorfsw32 said:
I am sorry what first hand experience do you have? I think it will last just fine on those because of the fact it only has to move 10 psi, just like my 6.4's that has been flawless, but thanks for your help...... Not

LPFP on the 6.7 pushes 75+ PSI

01PSD · Jul 19, 2013

That's really odd how it was working peachy and now BOOM dropping pressure like a boss. Unless it really is the motor again..

Layson · Jul 19, 2013

Nick, good luck with it. Gordon is using his as a low pressure pump as well on his cummins. He has had several of them on his truck now...

Remember Mark's new pump came straight out of the box not working... FYI

java · Jul 19, 2013

Have you checked the relay yet? Mine was doing something similar and the it turned out the be the wiring was getting hot and melting the relay. I switched to strictly diesels wire harness kit and haven't had any issues since. I also have a sump and RR feeding 190/100s.