Is the air dog supposed to turn on every time u turn the key or bump the starter? My air dog has gave a priming charge the last 10 times i turned the key and when i bump the starter it doesnt run either... but when i crank the truck it idles at 16 psi.... whats that all about?

---AutoMerged DoublePost---

sorry what i meant to say is that it doesnt always turn on when i turn the key or when i bump the starter

 

it should turn on whenever you turn the key or bump the starter, at least the one we have does

 

yeah mine isnt doin that.... it used too....it hasn't been on my truck for more than 2 weeks.....i tried to call airdog 3 times... no one answers

 

im wondering if your relay is bad, check the one in your harness and check the factory one inside the fuse box under the hood. Also check the fuse as well

 

thanx ill go check on all of that.......when i first put it on everything i turned the key for the wait to start light i hard it give a lil charge....then when ud bump the starter it would run for about 15 seconds.....yesterday it quit doing both......but when the truck starts the fuel pressure seems to be fine

---AutoMerged DoublePost---

so i just went look over everything.... seems ok the relay on the air dog harness is brand new the fuse isnt burnt and im not sure what im lookin for in the fuse box of the truck but when the truck is running the air dog is running but nothing up until that point... is this normal or should i take it somewhere to have it looked at?

 

Hmm, im wanting to say there is a factory fuel pressure sensor that the airdog harness plugs into,im drawing a blank as to how it works right now but I know its what trips the pump on and off unless the truck is running. Ill do some digging and see what i can come up with.

 

when i turn the key the wait to start light never comes on could this be an indication of a bad relay?

 

yeah it could be, also could be an early warning of an ECM issue, got any codes by chance?

 

none.....ill take the truck to my mechanic tomorrow and let him look everything over...i just had to change the vp44 and the lift pump so thats y i have the new airdog but now its got a new issue

 

I've read some places that having too much pressure before the truck starts will cause a hard start. People who've had this problem have set their pumps to only run when the engine is running.

Not sure how much truth there is to that statement.


Mine runs for one or two seconds when I first turn the key on.
If I bump the starter, it runs for 25-30 sec.