Fuel pump going bad?

[deathsled]

An air hose and compressor was used to blast air through fuel hose that goes to fuel pump sending air through the lines to the disconnected hose to the sending unit.  New stainless gas tank installed and new stainless sending unit (still reads inaccurately I might add having dumped 10 gallons into a 16 gallon fuel tank it reads half full). The line was clear. This video shows the pressure coming out of the fuel line to the primary carburetor and float bowl is not filling up as it should. Anyone can recommend a decent fuel pump for a non concours day two car that has a 302 late model engine?

[Bob Gaines]

Take the gas cap off and see if that makes a difference. If the gas cap vent is clogged then it will add a lot of resistance for your fuel pump to overcome while pumping. Air coming in from the vent will displace the gas being sucked out . Without the air coming in will make it harder for the gas to be sucked out. I hope that is all it is.

[deathsled]

Take the gas cap off and see if that makes a difference. If the gas cap vent is clogged then it will add a lot of resistance for your fuel pump to overcome while pumping. Air coming in from the vent will displace the gas being sucked out . Without the air coming in will make it harder for the gas to be sucked out. I hope that is all it is.

Too late for that unfortunately. As I was pulling on the rubber hose that goes to the fuel pump (after loosening the clamp of course, the metal line going into the pump pulled out. It maybe was press fitted in. So I will be buying another fuel pump and will also go with your suggestion. The pump on there was a canister type and looked old. I am thinking maybe an Edelbrock pump may be the upgrade I want.

[Bob Gaines]

Take the gas cap off and see if that makes a difference. If the gas cap vent is clogged then it will add a lot of resistance for your fuel pump to overcome while pumping. Air coming in from the vent will displace the gas being sucked out . Without the air coming in will make it harder for the gas to be sucked out. I hope that is all it is.

Too late for that unfortunately. As I was pulling on the rubber hose that goes to the fuel pump (after loosening the clamp of course, the metal line going into the pump pulled out. It maybe was press fitted in. So I will be buying another fuel pump and will also go with your suggestion. The pump on there was a canister type and looked old. I am thinking maybe an Edelbrock pump may be the upgrade I want.

I would suggest carter .One like this or similar. It looks better then those chrome plated edlebrock,Holley etc. IMO.  Plus it is OEM.https://www.jegs.com/i/Carter/180/M60454/10002/-1. It would be a more appropriate day 2 fuelpump IMO.

[deathsled]

I will follow your directive. Thank you for your guidance, Bob!

[deathsled]

As an addendum, the carb on the engine is a Holley 650 double pumper no gas filter. Without the canister on the Carter, any suggestion where or type of gas filter placement? Looks like on the Carter I will need a screw in fitting to link up with the gas line from the tank to pump.

[Bob Gaines]

As an addendum, the carb on the engine is a Holley 650 double pumper no gas filter. Without the canister on the Carter, any suggestion where or type of gas filter placement? Looks like on the Carter I will need a screw in fitting to link up with the gas line from the tank to pump.

Typically a screw in nipple on the inlet side of the pump. For most sanitary look install a 90 degree fitting on the output side then fabricate a steel line. The simplest way is to add a nipple fitting to the 90 and run rubber fuel line from the pump to a inline fuel filter and then on to the carb.

[hertzz350]

I too have a holley 650 double pumper carb on mine. I went to orielys auto parts and bought an inline glass gas filter for mine. I have been running it for years with no problems.

[JWH]

I am copy/pasting a post from a few months ago when I replaced the fuel pump on our 1967 GT500. To summarize, I found the CARTER brand fuel pump as Bob mentions worked perfect. Your part # will be different than mine due to the fuel filter. I hope this helps:



I'm posting the outcome of the fuel pump replacement, hopefully for the benefit of future searchers needing to replace their fuel pump.

        First, I need to point out that our car is very nice, but not nut-and-bolt concours so I did not feel the need to spend big $$ on a concours correct fuel pump.
        When searching the local auto-parts stores, the vehicle I entered for the search was a 1966 Thunderbird with the 428 engine.
        The first purchase was a Delphi fuel pump that worked well. A little too well. Following Kent's direction, I was able to take out a fuel pressure testing kit for the local O'Reilly's and thanks to Kent, discovered this pump was putting out nearly 16 psi. The specs are fuel pump pressure at 500 rpm, 352, 390 and 427 ... 4.5-6.5 psi. There was fuel coming out the top of the bowls and whew, the smell of the rich fuel mixture was overwhelming.
         The second purchase was a Carquest fuel pump part #3541143. When reading the description on the websites, it states that the Carquest pumps are engineered to the specs of the Carter fuel pumps. I had also read that if possible, get a fuel pump Hecho in Mexico and not one made in China. The Carquest was made in Mexico so I was optimistic. However, the psi was still a touch high putting out 8-8.5 psi.
         Not satisfied, I contacted our local speed shop here in Denver, On-Track Performance and he did some searching and said, "I can get you a Carter fuel pump. It will be here in a couple of days. It says it will deliver 5-6 psi." Getting pretty good at installing fuel pumps on a big block with power steering, I popped in the Carter fuel pump, held my breath and bingo - a steady 6 psi. The part number on the Carter fuel pump is M4008. It is also made in Mexico. Like the other three fuel pumps, it comes with the brass fitting to connect the hard fuel line and two gaskets. Searching on-line, the Carter M4008 is readily available from the likes of JEGS, Summit Racing, Rock Auto, etc for $40-$65. Let me repeat, this is not a concours correct fuel pump, but one that should have our car running smoothly and provide just the right amount of fuel pressure to keep those Holley dual fours happy in the coming years.
Jeff