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08-26-2021, 01:06 AM | #1 |
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Join Date: May 2010
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Y block no fuel
Hey guys,
I posted this over on the HAMB, but thought it would be wise to ask here as well. I'm messing with a Y block for the first time. Trying to get it fired up, but I have no fuel getting to the carb. The vehicle is a '64 F100 with what I believe to be the factory 292 Y block. I put new fuel in the tank, and removed the sender so I could make sure everything looked ok inside the tank. After cranking and getting it to fire up for a moment with starting fluid or pouring gas down the carb, I removed the line to the carb, and it was bone dry. I removed the feed line to the pump, and it was dry too. So, I siphoned gas out of that line so I knew I had fuel at the inlet side of the pump. Still bone dry on the other side. So, I thought the pump was bad, even though it was a newer pump put on by the previous owner. It did look like a cheap pump. I replaced the pump with a Carter M3528 pump. No change. The fuel line to the pump is not plugged, and there is no pre-filter. There is a new hose and filter after the pump. I cranked it over with my finger over the end of the hose coming out of the pump. It felt like it was trying to do a little bit of something. It kind of seemed like it was too easy to bolt the pump on. Usually when something goes that smoothly for me, it's an indication that something is wrong. Haha. There is an old electric fuel pump still bolted to the frame, this could be an indication of something wrong, or simply an electric pump was installed. Tonight, I pulled the pump and looked in there with a mirror and a flexible camera. The eccentric is there. I got a friend to crank it over for me and it looks like it’s doing what it’s supposed to. What else could it be? Is there different size eccentrics for different year Y blocks and mine could have gotten swapped with the wrong one or something? I know I could put in an electric pump and be done, but I now presumably have 2 new good mechanical pumps, so it would be nice if those worked. All the rubber lines are new. I'm not the one who installed them, but they have been replaced. The short section under the cab, then another short piece to the inlet to the pump, then its rubber all the way from the outlet of the pump to the carb with a filter inline. I did siphon the gas down to the inlet on the pump to make sure fuel was getting there. I have not yet tried gravity feeding from a different vessel, but I can give that a shot. The Carter pump did seem to be doing its thing when I just actuated it by hand. That's why I was thinking about the possibility of there being a smaller diameter eccentric from a different year Y block that could have gotten swapped in or something, and maybe the lever simply isn't being moved far enough. I'll give all the lines an inspection, and try using fuel from a different vessel. Any thoughts are appreciated. |
08-26-2021, 05:09 AM | #2 |
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Re: Y block no fuel
the eccentrics are all the same
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08-26-2021, 05:14 AM | #3 |
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Re: Y block no fuel
If an electric pump was installed with a separate filter, most likely if was used to feed the mechanical pump and not used as a primer pump having a fuel flow-thru rating. That filter may also be clogged. Possibly by-pass the pump and filter with a section of fuel hose to see if the mechanical pump will prime. Loosen the fuel cap (vent).
It is difficult for a mechanical pump to pull (vacuum draw) through an electric pump and it's filter. That pump has the be activated or isolated/removed from the circuit. The carb fuel bowl has to be filled. Once it starts off that fuel the mechanical pump should become primed. You need a combination vacuum/pressure gauge.
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08-26-2021, 07:01 AM | #4 |
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Re: Y block no fuel
Maybe the pump is installed incorrectly? The pump arm has to go UNDER the eccentric. The fact that you had no difficulty bolting it up suggests the arm is not positioned correctly, usually installing the pump is somewhat of a fight unless the eccentric just happens to be in the UP position. Here's a recent thread on the subject:
https://www.fordbarn.com/forum/showthread.php?t=295087
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08-26-2021, 12:19 PM | #5 | |
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Re: Y block no fuel
Quote:
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08-26-2021, 03:07 PM | #6 |
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Re: Y block no fuel
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08-26-2021, 03:09 PM | #7 |
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Re: Y block no fuel
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08-26-2021, 08:35 PM | #8 |
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Re: Y block no fuel
Check the flex hose between the hard line and the pump. They can go bad inside and you can't see it. Also check all your lines - a small hole in one can cause the pump to suck air instead of gas.
Did you blow air from the tank forward? You might try getting gas from a can instead of the tank - fill a can with gas and run a hose from the can to the fuel pump
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08-27-2021, 12:09 AM | #9 |
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Re: Y block no fuel
Check and make sure you don't have a fuel pump for a 6 cyl. car. I was sent the wrong one. It installed easily but the shape of the arm was too low for the eccentric to move it much.
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08-27-2021, 12:38 AM | #10 |
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Join Date: May 2010
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Re: Y block no fuel
Well, the fuel issue is solved.
I feel like a bit of a bonehead, but sometimes I am! It would appear that the previous owner had the fuel pump hooked up backwards, and as a result, so did I. I was in bed doing some research on Y blocks last night when I noticed how the fuel pump was hooked up. I thought, hey, that's the opposite of how mines hooked up. So, tonight I switched it, and there you go. Turns out a fuel pump works pretty well once you have it hooked up properly. Haha! Gotta make sure you eliminate the simple stuff first, but I didn't even think of that possibility. So, now I have fuel. I got the truck fired up, but not to stay running yet. I'll have to mess with it this weekend. I don't have much time during the week because I get home late. And I don't have a garage back yet since losing it in a fire, working in the dark and dirt doesn't make the job easy. |
08-27-2021, 07:38 AM | #11 |
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Re: Y block no fuel
You simply replaced the pump as it had been previously installed. You are not a bonehead.
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08-27-2021, 10:56 AM | #12 |
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Re: Y block no fuel
My hat's off to anyone willing to tackle work on their own vehicle. As Kultulz said, you are not the bonehead!!
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08-27-2021, 11:05 AM | #13 |
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Re: Y block no fuel
The man figured it out on his own. That's half of it.
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***** - WHY IS IT ... - ... that everything you buy in the grocery store is either wrapped in or contained in plastic but the government doesn't want you to carry it out in a plastic bag? WONDERING IN W(BY GOD)V ...
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08-28-2021, 03:26 PM | #14 |
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Join Date: May 2010
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Re: Y block no fuel
Thanks guys.
I got to mess with it a little bit today, and its running quite well now. I really need to get some wheels and tires for this thing now! |
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