highway problems

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Sep 22, 2005 | 10:53 PM

Rayf250

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highway problems

hears the basics on the truck. It has the four speed on the floor, 4x4, a 360 and 4.10 gearing. with that out of the way hears the problem. i just installed a holly four barrel 600cfm (4160 i think) on it with a edelbrock intake. it runs great in the city but on the highway the thing will stall out. when i get out and pop the hood the fuel filter is totally dry. so i upgraded to a holly electric fuel pump (7 psi). i thought that this would solve the problem but it didnt. all it did was make it easyer to restart on the side of the road. almost forgot it is a stock holly with single feed and vacume secondaries. this is a real stumper and i can use any help i can get. thanks

Sep 22, 2005 | 11:04 PM

fordeverpower

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From: iowa

I went through something similar.

I used to run a edelbrock carb and the fuel filter would go dry at times but the edelbrock didn't mind. Swaped in a new holley and it died when i stopped to turn around. did this many times and then ditched the filter and no problem since. Just going to have to replace the holley filters(dual feed avenger) more often.

Last edited by fordeverpower; Sep 22, 2005 at 11:31 PM.

Sep 23, 2005 | 07:43 AM

Freightrain

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From: Ohio

Ok...do you have one of those clear(bronze) filters?? Ditch it!! I had the same problem a couple years ago and NEVER could figure out why it would run out of gas. Pulled the element out of filter and never had problem since. Seems the bronze clogs up and won't let fuel thru? DOn't know, but just put a plastic one somewhere in the line and go with it.

Sep 23, 2005 | 08:35 AM

Rayf250

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i have a filter in line right befor the carb. it is a small chrome one that is brand new.

Sep 23, 2005 | 11:36 AM

Freightrain

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From: Ohio

Does it have the bronze insert? or plastic screen? If it's bronze, pull it out and see what happens. Mine was next to new(with little mileage) and was giving me fits.
I ran one years back, but had plastic screen and had no problems.

With an electric pump, it should not have any problems pushing fuel thru it. Have you check pickup in tank? How's the rubber lines? Maybe they are collapsing and cutting off fuel supply. Once you stop, relieve pressure, it opens and allows fuel again?

Just throwing some ideas out. I know my car had all new stuff in it and still have fuel issues, and the only thing that made a difference and allowed car to run to this day is removing the bronze insert in filter. I put one of the cheap plastic version back at tank for filtering.

Sep 24, 2005 | 05:36 PM

Rayf250

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yah thanks for the suggestions. i have already pulled the tank and drained it to check for some thing to plug it up but found nothing. i also replaced all of the fuel line from tank to engine with fuel injection line to hold up to the fuel pump. I dont think that the carb is to big for that engine.

Sep 24, 2005 | 05:50 PM

Spaznaut

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From: NE Tennessee

What size fuel line? At least 3/8" I'd think? Maybe you have some trash in the carb. Sounds like maybe a float adjusted wrong and when the carb really needs the fuel it's not in the bowl. This happens to me in my Mustang when I get it out but its always the fuel filter needs to be cleaned.

Really sounds fuel line or pump related. I'd get a fuel pressure guage up next to the carb to see what's really going on before you throw more money at it.