Fuel Pump eater
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Junior User
Joined: Mar 2003
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From: Albuquerque, NM
Fuel Pump eater
Hi All,
I have a 72 F100 with a 360/390 engine (not sure which, but they are similar). Since August 05 I have put 3 fuel pumps on it. For some reason they last about 2 months or 500 mines and simply stop doing whatever they do.
The last one (replaced last week) was pumping air out of both nozzles. Does any one know what could cause the problem? THere doesn't seem to be any physical damage to the pump itself. I am thinking that if this continues to put in an electric system. How hard is that?
Thansk,
Tony in New Mexico
I have a 72 F100 with a 360/390 engine (not sure which, but they are similar). Since August 05 I have put 3 fuel pumps on it. For some reason they last about 2 months or 500 mines and simply stop doing whatever they do.
The last one (replaced last week) was pumping air out of both nozzles. Does any one know what could cause the problem? THere doesn't seem to be any physical damage to the pump itself. I am thinking that if this continues to put in an electric system. How hard is that?
Thansk,
Tony in New Mexico
Postmaster
Joined: Apr 2002
Posts: 3,613
Likes: 6
From: Coal country
Sounds like the seller is using the cheapest supplier, who is using the cheapest workers.
I would keep taking it back, or possibly pay the extra bucks for a brand new one.
If you go electric, you will need to put in the line a pressure regulator and wire it up, but that kind of work isn't that hard.
You will also need to get a pump block-off plate to cover the hole. It would be unwise to leave a afunctioning - albeit malfunctioning - pump working. It could introduce outside contaminants into the internal engine system if the diaphragm fails.
I would keep taking it back, or possibly pay the extra bucks for a brand new one.
If you go electric, you will need to put in the line a pressure regulator and wire it up, but that kind of work isn't that hard.
You will also need to get a pump block-off plate to cover the hole. It would be unwise to leave a afunctioning - albeit malfunctioning - pump working. It could introduce outside contaminants into the internal engine system if the diaphragm fails.
Last edited by banjopicker66; Feb 22, 2006 at 09:26 AM.
Senior User
Joined: Jun 2005
Posts: 287
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From: Utah
A lot of people make the mistake of pushing on the actuater arm thinking they are testing it. This will either tear the diaphragm, or set it up to tear. The Cam offset will only move the arm a 1/4 to 3/8 of an inch in normal operation. Never test a manual fuel pump by pushing on the Arm.
Also check your fuel tank. Could be rust and or dirt in the tank. This will get into the pump and wear holes in the diaphragm. Put an inline fuel filter in it, or flush and clean the tank.
Also check your fuel tank. Could be rust and or dirt in the tank. This will get into the pump and wear holes in the diaphragm. Put an inline fuel filter in it, or flush and clean the tank.
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Joined: Mar 2003
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From: nevada
If you go electric, it is very easy to go with this setup. i have been using the Holley Red pump for several yrs with no probs. they are preset at 7lbs pressure, so no regulator is needed. the only thing I dont like about it is that it does have a bit of noise when it is running. They suggest that you dont mount it in a hot place (engine comp or next to exhaust). I also wired it thru a hidden fuel pump switch.
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Fleet Owner
Joined: Jan 2004
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From: Brentwood,CA
the pumps you buy at parts stores are not rebuilds. they are new. most are made by MASTER in the USA. you need to install them right. you always make sure the engine is at TDC when installing the pump.
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Junior User
Joined: Mar 2003
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From: Albuquerque, NM
Originally Posted by ford390gashog
the pumps you buy at parts stores are not rebuilds. they are new. most are made by MASTER in the USA. you need to install them right. you always make sure the engine is at TDC when installing the pump.
Thanks,
Tony
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Joined: Feb 2006
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From: Paulding County
Originally Posted by ford390gashog
the pumps you buy at parts stores are not rebuilds. they are new. most are made by MASTER in the USA. you need to install them right. you always make sure the engine is at TDC when installing the pump.
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From: nevada
filters
I'm with IBeam, install a filter between your tank and pump. These old trucks have a lot of crap in the tanks, ( I even found 4 marbles in one of my saddle tanks when I removed it). I like the clear bodies filters with replaceable filters. Easy to see if anything is in there.
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