FUEL PUMP PROBLEMS
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Freshman User
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FUEL PUMP PROBLEMS
Hey guys,
I have an 1984 Ford f150 with a 302.
It was parked in a barn 17 years ago an hasn't been started since
Started playing with it found it has a bad mechanical fuel pump. Put new fuel pump in it and new rubber lines
Dropped the brand new rubber line directly from the brand new fuel pump into a container of gas and I it doesn't suck fuel.
I do believe it is installed correctly under the eccentric. What could I be doing wrong
What am I missing?
I have an 1984 Ford f150 with a 302.
It was parked in a barn 17 years ago an hasn't been started since
Started playing with it found it has a bad mechanical fuel pump. Put new fuel pump in it and new rubber lines
Dropped the brand new rubber line directly from the brand new fuel pump into a container of gas and I it doesn't suck fuel.
I do believe it is installed correctly under the eccentric. What could I be doing wrong
What am I missing?
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Joined: Jan 2001
Posts: 57,014
Likes: 2,751
From: Virginia
Take the line off the carb and see if the pump will squirt fuel into a container above. If it does, your needle in the carb is stuck shut. You could hook the line back up to the carb and then take the plastic end of a screwdriver and rap on top of the carb to try and get it loose. Or you may have to take the carb apart and clean it out.
If it won't pump with the line off the carb, then it may be a bad pump.
If it won't pump with the line off the carb, then it may be a bad pump.
Moderator
Joined: Jan 2001
Posts: 57,014
Likes: 2,751
From: Virginia
Is it bolting up ok? You should feel the arm pushing up under the eccentric up inside the engine.
Take it back out, leave the line in the can of fuel, and push the arm up and down by hand. Do you get any fuel like that?
Take it back out, leave the line in the can of fuel, and push the arm up and down by hand. Do you get any fuel like that?
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Freshman User
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Yeah it seemed like it was bolting up fine. I bumped the engine once to make it go in a little easier.
What would be the purpose of taking the dist cap off and watching it rotate? I do know the truck will run because it will run off gas poured directly down the carb. But I am not getting any fuel from the pump
What would be the purpose of taking the dist cap off and watching it rotate? I do know the truck will run because it will run off gas poured directly down the carb. But I am not getting any fuel from the pump
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Moderator
Joined: Jan 2001
Posts: 57,014
Likes: 2,751
From: Virginia
I thought you might have timing chain problems, the timing gear on the camshaft is what runs the fuel pump. But if it runs pouring fuel down the carb, that would not be it.
P.S. On your test hose in the bucket, cut the end in a vee cut to make sure it's not sucking up against the bucket and getting plugged off.
P.S. On your test hose in the bucket, cut the end in a vee cut to make sure it's not sucking up against the bucket and getting plugged off.
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Post Fiend
Joined: Feb 2008
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From: St Albert, Alberta
Hey guys,
I have an 1984 Ford f150 with a 302.
It was parked in a barn 17 years ago an hasn't been started since
Started playing with it found it has a bad mechanical fuel pump. Put new fuel pump in it and new rubber lines
Dropped the brand new rubber line directly from the brand new fuel pump into a container of gas and I it doesn't suck fuel.
I do believe it is installed correctly under the eccentric. What could I be doing wrong
What am I missing?
I have an 1984 Ford f150 with a 302.
It was parked in a barn 17 years ago an hasn't been started since
Started playing with it found it has a bad mechanical fuel pump. Put new fuel pump in it and new rubber lines
Dropped the brand new rubber line directly from the brand new fuel pump into a container of gas and I it doesn't suck fuel.
I do believe it is installed correctly under the eccentric. What could I be doing wrong
What am I missing?
Cover the inlet with your finger, actuate the cam lever and make sure it pulls a vacuum and most importantly holds it. You may have to put the pump in a vise to hold it while you this. More than once I have come across brand new pumps that were faulty. (The wonders of off shore parts)
Barring that you are not getting the pump arm under the eccentric. It is easy to miss doing that.
Senior User
Joined: Mar 2011
Posts: 131
Likes: 1
It is possible the pickup tube filter in the tank is plugged or the tube has rotted off. Blow thru the inlet line to the pump to be sure it clear then pull a suction on it. You should be able to pull gas to the pump if the pickup tube is good.
Moderator
Joined: Jan 2001
Posts: 57,014
Likes: 2,751
From: Virginia
He is sucking directly out of a gas can up front, not the truck's fuel tank.
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