Fuel pump?

[KiltedBanshees93GT]

I think my fuel pump is on the way out. The car died on the way to work,but then started right back up.when I checked the inline filter, it was almost completly empty, after a few seconds at idle, it slowly filled up again. it was stumbling a little again by the time I got to work, and the filter was empty again. Same story.
If there was just some kind of blockage, how could I test it? Take the lines off and clean them out with compressed air?

J

[rwhite65]

Isn't there a filter on the bottom of your fuel pump, the metal canister?
Ryan

[mustangman65_79]

Originally posted by rwhite65
Isn't there a filter on the bottom of your fuel pump, the metal canister?
Ryan

I think that was a '64 and '65 item only, but u never know.

But it kinda does sound like the fuel pump is going out.

[rwhite65]

I am not positive there is one on that motor, but I for some reason was thinking it was on most of the 289's. I have taken mine off before when I thought it was bad and pushed down on the lever to see if it is squirting out good, but I really have no idea how to judge that. Seems to me fuel pumps are fairly cheap for them anyhow.
Ryan

[mustangman65_79]

a stock one is cheap, yes, but we don't know what he has-lol

Mine was like $59, it's a holley 110 GPM-lol

[KiltedBanshees93GT]

I cant recall having seen any type of canister by the fuel pump, and according to my manual (granted its a hayes) the only filter used was an in line. The car hasnt done it again since thurs night, but I'm going to keep an eye on it. I just dont need any more stuff to do to this one while I'm trying to get the 93 back on its feet

J

[mustangII460]

Im confused, this is the 66 Mustang? Remove line at carb and crank it to see if it squrts. Also check your floats on the Holley.

Or is it a 93 GT? If so its the pump.

[rwhite65]

It is the 66 Mustang that he is having the fuel problems with mustangII460.

[mustangII460]

Remove the line off the carb, crank it over and see if it squirts.

Fuel will drain back to toward the tank. So even if there doesn't seem to be much fuel in the filter or line, isn't a perfect indicator.

Is your carb adjusted properly? Also the accellerator pump maybe bad. These will cause the problem you describe.

[Clapton151]

Hey,

I would just replace the pump. They're not expencive they're like 30 bucks, and they're not hard to change. If it's on the way out then might as well get it before it gets you.

[Jeff65]

OEM mechanical pumps may not be the best but they can pump a lot of gas in a short time. Three revolutions of the engine should fill the fuel filter and the carb float bowls. It sounds like you have a blockage in the fuel line but the fuel pump could also be bad.

Remove the body to fuel pump line. When lowered below the tank height, fuel should free flow (gravity feed) from the line. Plug the line temporarily after doing the check. If gas flows freely from the body line, then replace the fuel pump. If it does not flow freely from the body line, then the fuel sender screen in the tank is the next thing to check. The screen in the tank can become clogged with old junk (corrosion) in the tank.

Early Mustangs (through mid '65) were originally fitted with a Carter fuel pump having integral filter. The filter screws onto the bottom of the fuel pump. These pumps are still available and can retrofit to any 289/302/351w. I like them because no other fuel filter is required and it makes for a compact fuel system.

In late '65 Ford started installing Carter fuel pumps with separate in-line fuel filter. This is commonly found on '66 and later V8 cars. The fuel pump is dimensionally the same but does not have the screw on filter at the bottom of the pump.

Either of the above are appropriate to your '66. You need both a pump and a fuel filter and so either satisfies the need. Here's a picture of the two types:

http://johnsmustang.com/Catalog/234/