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Old 10-18-2013, 08:40 PM
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Question on E Fuel and Air Dog.....

A buddy of mine with a 2001 7.3 and I were talking about Electric fuel for my OBS. He said he has an extra Air Dog pump and filter setup he is not using. I believe it's a 130/55? Anyway, he said he would give me one heck of a deal on it and all I would need would be a wiring harness.

So, I called Air Dog's tech department and the gentleman there told me the setup my fried is offering is about 6 years old and they no longer make parts to support it. He also said that the mechanical pumps on our OBS trucks are pretty much rock solid and that I should leave my mechanical pump alone. I explained to him that I thought at WOT sometimes I feel like I am running out of fuel pressure to the injectors.

He said there is an easy fix for that and to run a low pressure 8-10 PSI pump inline between the selector valve and the mechanical pump to keep fuel to the pump and to keep the float bowl full of fuel. If it works, that sure sounds much easier than doing an entire electrical pump setup.

I have never heard of this before. Has anyone done this? Does it work?
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Old 10-19-2013, 05:07 AM
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Ummm. Pretty sue that guy has no idea what he's talking about, anyone who calls our mechanical pump rock sold has a few screws loose.
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Old 10-19-2013, 07:03 AM
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Agreed, that's why nobody has mech fuel pumps, even ford puts an electric fuel pump in on the 99+
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Old 10-19-2013, 07:30 AM
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That's why I am asking. I had never heard anyone say that before, let alone a technician from an electric fuel manufacturer. Perhaps he just deals with the issues of electric fuel systems all day long and the grass just looks greener on the other side?

He did make me wonder about just adding a low pressure electric pump to the supply side of the stock fuel system. It sure sounded like an easy (too easy) remedy to our mechanical pumps inability to keep up with high fuel demands.

Is it even plausible?
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Old 10-19-2013, 08:23 AM
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In theory it does sound nice, but it doesn't seem like the pump could put more fuel than it already sends, it can only flow so much ya know
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Old 10-19-2013, 08:42 AM
m j m j is offline
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Quote:
I explained to him that I thought at WOT sometimes I feel like I am running out of fuel pressure to the injectors.
done any testing to see if the theory is accurate?
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Old 10-19-2013, 09:12 AM
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No, I haven't done any testing to determine if I am indeed losing fuel pressure. I just suspect the way the power falls off after getting on it for more than 15-20 seconds that it's probably a loss of fuel pressure causing it. I have a SRP1 HPOP so, I don't think it's oil pressure that is dropping off.

I do have one of the Snap on MT2500 scan tools now, I just haven't figured out how to use it yet.
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Old 10-19-2013, 05:27 PM
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yes, people on the forum have done it. not many though (i can't remember the one guy that i know has)
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Old 10-20-2013, 03:05 PM
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The low pressure pump feeding the machanical pump is how the common rail, p pumped, and older mechanical pumps work. Take a high volume low pressure pump and feed the mechanical high pressure pump. He could have just been mistaken on the engine he was dealing with. Maybe the older 7.3 with a mechanical infection pump ?
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Old 10-20-2013, 06:39 PM
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I can't explain why (maybe a cheap alternative to a Bean's system) but, the concept sounds intriguing to me.
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