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Old 11-13-2004, 12:49 PM
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Fuel line question

I'm a rookie to this so bare with me. I have a 350 small block in a 1953 chevy truck. The problem is the first time I took it for a drive it done fine, the second time the skips started, seems it done the most going up hills. We put a holly blue fuel pump and a 160 gph filter, now every one is saying change your fuel line which is 5/16 stainless from a 650 Holly to the fuel pump, from there we have a3/8 to the tank, which is rubber. Another guy says it could be our floats in the carb. Any info would help!!:boxing.

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Old 11-13-2004, 01:01 PM
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I would start with the floats on level ground, look down the carb and see if the manifold is wet, and go from there!
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Old 11-13-2004, 01:03 PM
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blue

HOW LONG HAVE YOU HAD THE HOLLEY BLUE?

also, how do you have it mounted?

i have the same pump on a 85 k5, i hate it.

it doesnt sound like a fuel line problem to me.

it may be a carb problem tho - any idea the condition of your carb?

sounds more like ignition breakdown to me but its hard to tell without all the info.

r4r
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Old 11-13-2004, 01:30 PM
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Fuel problem

The holly 650 carb is new as is everything on this truck, the carb has never been ajusted so we're thinking it could be the floats also.The holly blue pump is located on the frame maybe 3 ft from the gas tank with the fiter behind the pump.We're going to get the floats checked next. Thanks people!!!
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Old 11-13-2004, 03:23 PM
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If you have over a few inches of rubber hose from the tank to the pump, it could be collapsing, specially if the cap is non vented.

Troy
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Old 11-13-2004, 04:23 PM
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loc

the pump is below the tank right?

the filter behind the pump as in it goes tank - filter- pump - carb?

or tank - pump - filter - carb?

i had my 1st blue on for about a month and it burnt up because the filter was on the wrong side of the pump.

i think its a pusher, because it has to be lower than the tank.
if thats the case the filter has to be between the pump and the carb.

if it burns up because the filter is on the wrong side holley will not replace it. what a joke huh?

r4r
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Old 11-13-2004, 06:52 PM
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Still at it , O.k. Gas cap is vented the fuel pump is below the gas tank. in order tank, filter, pump to carb. Checked with fuel pressure gage at carb and it read 6lb pressure it ran for 5 mins. than the pressure dropped to zero. Than I raised the pressure on the regulator and the gauge showed 6.5 lbs of pressure and it stays there. Tomorrow I'll try it out and go from there. thanks for your input.
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Old 11-13-2004, 09:49 PM
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filter

yea... raise your pressure some..

i think mine runs at 7 or better... maybe as high as 9..

you might want to move that filter tho. i ended up putting mine about a foot from the carb so i can change it under the hood.

i dont see why it would make that big of a difference but the holley tech swears having the filter before the pump will burn it up.

what kind of filter are you using?
r4r
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Old 11-13-2004, 11:10 PM
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The filter is a powerflow inline performance filter I ordered from cnc- motorsports. The fuel filter is behind the fuel pump. we're going to check it out tomorrow and see what happens. Thanks!!
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Old 11-14-2004, 05:40 PM
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Problem Fixed!!!!!

After nearly wanting to pull my hair out, we finally found out what the fuel problem was, it was the gas tank, a new one at that . The sending unit gasket on the tank had slipped at the factory and who would have guessed of something like that, until you run out of ideas. It was letting air in the lines, that's why we couldn't keep any fuel pressure. Thanks again for the imput.
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