Fuel pressure issue

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dragracer

Junior Member
Joined
Jul 5, 2013
Posts
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Location
Indiana
Ram Year
2001
Engine
5.2
So, last weekend truck decided not to start.

Went thru fuel system checks 1st.
Fuel relay checks good, pcm good, power at relay pin 30, fuse good.

Jumped pin 87 & 30........pump runs, but no fuel pressure at the fuel rail. Zero according to fuel pressure gauge. I see no leaks between tank & fuel rail.

Could the built in filter be clogged to the point of not allowing fuel past? I've never seen a filter plug up.

Or the internal regulator is bad?

I really don't see anything else it might be. Pump runs but no pressure at rail.

What sucks is there's 20 gallons of gas in tank!!

2001 Dodge Ram 1500 4x4 5.2L
 

Roadhouse71

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Dec 21, 2017
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Location
Kentucky
Ram Year
1997
Engine
5.9L
The transfer hose on your fuel pump it self may have sprung a leak before it makes it to the top of the pump module in the tank. It a little corrugated hose about 3.5 inches long. Your truck looks very clean you might just unbolt the bed and raise it up to get to the top of your tank so you don't have to fight a full tank of gas. Also check your injector signal with a noid light
 

ouch1011

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Dec 3, 2017
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Ram Year
1996
Engine
Magnum 5.2
If the pump runs but builds no pressure, it's either physically broken, sprung a leak inside the tank, or you have an injector or 8 stuck wide open and filling the engine to the brim with gas (unlikely)
 

ouch1011

Member
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Posts
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Ram Year
1996
Engine
Magnum 5.2
If I was doing this job on the ground, assuming the truck isn't rusty, I'd pull the bed and work on it from above. I always try to avoid working on my back under a vehicle.
 
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