The Ford Barn

cretin · 08-26-2021, 01:06 AM

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, 01:06 AM	#1
cretin Senior Member Join Date: May 2010 Location: S.F.V. Cali. Posts: 133	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.