63 F100 fuel problems
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From: NE OH
63 F100 fuel problems
I have a problem with fuel delivery on my family heirloom stepside. 223-6 3-speed trans. Been running fine until last week, when it started hesitating now and then at high speed. It would clean up eventually. This week it died on the road. It would restart, but not take throttle. I suspected crud in the lines, but in blowing compressed air back thru all of them, they seem to be clear. I put a NOS Ford fuel pump on today, and now it won't start at all unless I pour gas in the carb. Think the camshaft eccentric could be worn out, and the new pump is pickier than the old one?
Also, where can I get a 2-1/16" inlet diameter replacement air cleaner (I'm thinking about those little 4" round hot-rod jobs) to replace the oil bath? A lot of places have them, but I haven't found my size yet.
Thanks in advance,
Mike
Also, where can I get a 2-1/16" inlet diameter replacement air cleaner (I'm thinking about those little 4" round hot-rod jobs) to replace the oil bath? A lot of places have them, but I haven't found my size yet.
Thanks in advance,
Mike
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From: Gaffney, SC
You didn't mention if you changed the fuel filter. A clear one is good so you can see if you've got junk in your tank. First check the fuel pump. It's easy enough to check with an empty can. If some gas is coming out of the line, then it's probably ok. Second take carburetor half apart and look at the bowl to see if it is wet or dry. If it's dry, then you probably just need a new needle and seat. If it's wet or full of gas, I would buy a rebuild kit.
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From: NE OH
Thanks,
I didn't have a fuel filter on it. The old replacement pump (been on there at least 15 years) didn't have the glass bowl with a filter, like the original did. There is no other filter on this one, and never was. In retrospect, I should have put an inline filter in somewhere, but I never did. The new one has the glass bowl & the filter. It looks like the pump is not pumping enough fuel for some reason. What little is being pulled in is good clean fuel.
What got me thinking worn cam is the recent article in 'Old Cars Weekly' by Angelo Van Bogart, that discussed this same problem with a '55 Cadillac, and it's eventual cure by electric pump.
Mike
I didn't have a fuel filter on it. The old replacement pump (been on there at least 15 years) didn't have the glass bowl with a filter, like the original did. There is no other filter on this one, and never was. In retrospect, I should have put an inline filter in somewhere, but I never did. The new one has the glass bowl & the filter. It looks like the pump is not pumping enough fuel for some reason. What little is being pulled in is good clean fuel.
What got me thinking worn cam is the recent article in 'Old Cars Weekly' by Angelo Van Bogart, that discussed this same problem with a '55 Cadillac, and it's eventual cure by electric pump.
Mike
Last edited by Shoveldog; Jul 28, 2007 at 10:52 PM.
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From: Gaffney, SC
It takes very little gas to fill up the bowl on your little carburetor and start the truck. It still sounds like your needle valve is stuck closed. There may be other problems, but I would still check that first. I forgot the NOS pumps had a filter on them. Electric pumps are fine for some cars and I had one on my truck for a while, but I found that my old one bbl could just not take the pressure. It would practically blow the carb apart at the seams.
Mountain Pass
Joined: Oct 2004
Posts: 139
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From: Orting
shoveldog, I have had the same problem a couple of times. The first time my fuel pump wasn't putting out enough pressure. I put a T fitting in the line from my pump to carb at it was only putting out 1/2 psi it should be about 3.5 to about 6 psi. I changed the pump and no more problems. Then about 2 years later I had the same symptoms (missing with throttle irratic idle and just generally running poorly. I put my gauge on it and it was a rock solid 4 psi. I then took the air horn off my autolite 1100 carb and there was a fine silt at the bottom of my bowl. I have a fuel filter on it so I don't know where that came from. So I took off my carb and cleaned it with carb cleaner and blow it out with compressed air. has ran fine since. I would suggest checking pump pressure then cleaning carb. I think sometimes you get crap gas and it plugs the small passages in your carb.
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From: NE OH
I second that bad gas part. A friend stopped by today with new 12 volt electric fuel pump which he hadn't installed on his old car yet. A lot of the old car guys I know have to run an electric at least as a backup, as many old cars seem to vapor lock more often on the crap gas we get now.
We were getting little or no action at all with either of the mechanical pumps. Although both seemed to build pressure off the truck, I couldn't find my vacuum guage. Neither pump would put a good stream of gas out the disconnected carb inlet, we tried it hooked to the tank and out of a gas can. After blowing air back thru all the lines and in both directions again, we decided to try the electric temporarily. It seems to have fixed the problem.
I will pop the top of the carb tomorrow and look at the needle valve and check for crud.
Thanks again,
Mike
We were getting little or no action at all with either of the mechanical pumps. Although both seemed to build pressure off the truck, I couldn't find my vacuum guage. Neither pump would put a good stream of gas out the disconnected carb inlet, we tried it hooked to the tank and out of a gas can. After blowing air back thru all the lines and in both directions again, we decided to try the electric temporarily. It seems to have fixed the problem.
I will pop the top of the carb tomorrow and look at the needle valve and check for crud.
Thanks again,
Mike
Last edited by Shoveldog; Jul 29, 2007 at 04:57 PM.
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From: NE OH
Does any one know where I can buy a block off plate for the 223-six's mechanical fuel pump? I believe the 'diamond' shape fuel pump mount is common to more Fords than just this engine. I would not think it would be a hard thing to find, but no one around here carries it, and the catalogs I have and online sources don't seem to list one. I'm just a short distance from Summit racing, but at least online, they don't seem to have it.
Thanks,
Mike
Thanks,
Mike
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Joined: Nov 2001
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From: Escondido, CA
You can make a fuel pump block of plate with some 3/16" flat stock from a metal supply shop or modify a premade one from another engine to fit your engine.
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From: NE OH
Thanks Mark,
I was all set to roll down to the local welder's after work and pick up some flat stock. Then I decided to try Summit Racing in person (their main warehouse is close by). While I couldn't find that plate on their website, they did have it in stock. Little chrome job was under $5.00 with the gasket and tax. Cheaper than what ever the shop would have charged for the flat stock and my hour fabbing it.
She's all plumbed, wired & test driven. Guess we'll make the Thursday night cruise this week.
Mike
PS: some of the older guys around here tell me you used to be able to buy a shim/shoe to fit over the fuel pump arm when the camshaft wore to the point fuel pressure dropped off. Buy a few more miles cheap.
I was all set to roll down to the local welder's after work and pick up some flat stock. Then I decided to try Summit Racing in person (their main warehouse is close by). While I couldn't find that plate on their website, they did have it in stock. Little chrome job was under $5.00 with the gasket and tax. Cheaper than what ever the shop would have charged for the flat stock and my hour fabbing it.
She's all plumbed, wired & test driven. Guess we'll make the Thursday night cruise this week.
Mike
PS: some of the older guys around here tell me you used to be able to buy a shim/shoe to fit over the fuel pump arm when the camshaft wore to the point fuel pressure dropped off. Buy a few more miles cheap.
Last edited by Shoveldog; Aug 1, 2007 at 10:38 PM.
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