Truck won't start... what on earth are these parts?
Hi. I'm working on a 1986 F-150 that won't start. We know the starter is working, and that if you put fuel directly into the carburetor, the engine will catch. This leaves anything between the gas tank and the carburetor.
We've already replaced the fuel filter, so we know that's clean. The fuel line isn't leaking either. This leaves us to believe the problem is in the fuel pump. We're guessing this tall metal thing happens to be it, though it doesn't look like any pump we've seen before. It's located on the driver's side of the engine, bolted to a bracket onto the engine block. We can't find any electrical connections, so we're guessing it's mechanical. Looking mostly for confirmation on this.
The other unidentified part is a black box on the passenger side, up by the radiator. The top is divided into two parts, one marked with letters, radially (like a clock face) from A to (if I remember right) E. The other side has numbers. The side with letters has a kind of rubber plug on it that looks to be designed to let air into the box. The other side has a tube leading out, and splits in three directions, one of which goes into the carburetor, the other two we have no idea.
Attached are pictures of the supposed pump and the unknown box, as well as a picture of their surroundings.
Any help or information would be most helpful. Thanks!