i just installed an airdog 150 in my truck and the gauge was acting normal m15 at idle and 12 wot.....then today i was watching it and it was jumpinh in between 14 and 18 while driving..... can someone help me out?

 

Mine does it as well , it dont hold constant pressure (Steady Needle) because the fuel is circulating and only sending a certain amount to the engine , Where as before its a 1 way street

 

WOW!! Welcome to my world! Honestly to me it shouldn't be doing that. I mean the spring is set to 15psi and that's what it should be pushing too. I can understand a little fluctuation, but not a constant 4-5psi fluctuation.


Here is an old video of my first AirDog pump.
Video - Fluctuating fuel pressure. The truck was reved up to 2200 rpms.

My FP is currently bouncing from 13-16 or so. It's just really WEIRD how when I installed my pumps or messed with the spring that the FP was PERFECT and then later down the road is goes haywire.

I actually talked to Anthony at AirDog last friday and he is sending me a new spring to see if that does anything. Also Charlie has sent me 2 pumps and we tested my last one at the drag race in Steele, Alabama a while back and it worked fine. I then put it on my truck and my FP was fine, nice and steady for about a 100miles or so then it went to fluctuating again. Charlie told me to check the spring, so I took it out and strecthed it a wee bit and reinstalled it. Bam, FP is sitting right on 16 and not moving, but 2 months later its doing it again and still is to this day. When I get that new spring in I'll let you know how it goes.

 

Looking for the up date on the new spring. Mine is doing the same thing. It was steady as a rock 14 to 15 lb for a few mounths thean went crazy.

 

mines been doing it since i posted this thread and idk what to do, i just run it....as long as i dont see it drop below 10 i keep on truckin

 

i wasnt getting enough psi passed my oem filter on my tuck so i shimmed it with 3-5/16 washers and im getting 12psi to my cp3 pump directly, before it was only like 8psi.

 

The only thing about this thread that Ps, me off is that are AIRDOGS people now that we are haveing problems and thay do not respond!

 

 

I do not think the spring is going to fix this.

I watched your video and from what I see, the internal dampers int eh gauge are shot.

Are you running a snubber or isolator in line? To me, it looks like the gauge is shot. This is VERY common on VP trucks due to the hammering pulses from the VP to the gauge.

Dave

 

mine does that too but one when driving, but i got bad injectors. i got an electrical gauge btw