Quick question 2003 6.0

[Pmcmanus90]

Quick question jus put a lot of stuff on my truck and jus wondering when u get in it is your fuel pressure suppose to drop? Mine is at 60 when I get in it good I've seen it drop to like 40 or a little lower any help is appreciated this is on my 2003 6.0

 

[swinky]

40 is a little low. Won't hurt anything in a short amount of time though. If you're going to run stock injectors forever I'd just replace the hfcm with a new one. Or just replace the filters if you haven't tried that.

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[Pmcmanus90]

Well I jus put all this in the truck
190/75's
Mtw MADMAX turbo
Airdog 150
Sump kit
58 volt ficm

Idk maybe I didn't hook the airdog up right?

 

[swinky]

You need a regulated return. That won't help your fp though. Sounds like the airdog isn't keeping up

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[Pmcmanus90]

It has a regulated return kit to

 

[weekendwarriorfsw32]

You have an air dog...... Thats the problem LOL

 

[ghohouston]

^agreed

 

[scparrish]

Yeah the airdog is the problem should have gone a1000

 

[webb06]

Shouldn't the airdog be adjustable?

 

[Pmcmanus90]

Ok I heard the air dog was just a lift pump and can be ran with the A 1000? Where can I buy an A 1000?

 

[scparrish]

That's the beauty of the a1000 you can find them anywhere

 

[Pmcmanus90]

lol where I cant

 

[weekendwarriorfsw32]

You can not use the airdog you have to feed an A1000

 

[Pmcmanus90]

Oh ok so what can I do? I heard two things I heard your suppose to only run the airdog and I heard that the airdog is just a lift pump to feed your stock pump and that's how I have it hooked up I just really want to get this straight

 

[FaSSt9602]

You say you have an AD150 low pressure pump right, not the AD2 high pressure? If so, it should be feeding the stock HFCM, which is a pretty proven setup overall. Not sure where the issue could be...no leaks anywhere?

If it is the AD2, that isn't uncommon. I found that if I turn my RR back to about 48psi, it helps hold pressure at WOT and I don't drop below 45psi. Not sure the logic behind that, but if I bump the RR up to 60ish, it will drop to 40psi WOT.

 

[Rob D]

Where did you tap for FP

 

[Pmcmanus90]

No leaks I'm guessing weak stock pump

 

[sideactiondiesel]

I have a like new unit on the shelf A-1000 . But my suggestion is not to use the AD to feed the A-1 because it will not keep up. been there before. PM if interested .

 

[04stroker]

Sounds like your stock pump is getting weak. He has a airdog 150 feeding a stock pump which has always worked great for me with a regulated return for that size injector. The airdog 2 is junk. I keep the stock pump as much as possible because availability is always easy you can get them anywhere.