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Old 05-30-2020, 01:14 PM   #1
Sid
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Default Y block fuel pump

Has anyone ever had a mech. fuel pump that has pressure on the carb. side but will not suck fuel on the inlet? This is an Airtek 4206 pump and I do know there are no inlet air leaks.
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Old 05-30-2020, 03:04 PM   #2
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Default Re: Y block fuel pump

must be a stuck or inoperative check valve in the pump.
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Old 05-30-2020, 05:00 PM   #3
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Default Re: Y block fuel pump

The guy was driving about 35 and car quit. I went to where he was and checked for spark all was good. Pulled fuel line off carb. and cranked engine for about 15 sec. and no fuel. Hooked hose to the fuel line going to tank and gave a little suck and got fuel. Bench tested pump and felt pressure on carb. side but feed side would not suck fuel from a can. Found another pump in my stash and car is running now. BTW that is an expensive pump buying new. Especially the Carter M73066. Airtek is about $100.00 Carter $180.00
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Old 05-30-2020, 09:24 PM   #4
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Default Re: Y block fuel pump

Quote:
Originally Posted by Sid View Post
Has anyone ever had a mech. fuel pump that has pressure on the carb. side but will not suck fuel on the inlet? This is an Airtek 4206 pump and I do know there are no inlet air leaks.
Quote:
Originally Posted by 39deluxecp View Post
must be a stuck or inoperative check valve in the pump.
There is a small check valve on both the inlet and outlet sides of the fuel pump.
If just one is stuck or not seating, the pump sort-of works but not like it should.
Much like the intake & exhaust valves in the engine.
.

Last edited by dmsfrr; 06-17-2020 at 11:32 AM.
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Old 05-30-2020, 11:23 PM   #5
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Default Re: Y block fuel pump

Those new pumps you get that now cost $109.00 are junk. Made in china! they have really good pump diaphragm material. Problem with them is those two check valves in the bottom chamber go haywire. You can pump all you want, and it will just drain out into the supply line from the other valve.
Sometimes the pump will still supply enough fuel to the carb to keep it running while unbeknownst to the owner, the check valve is draining some of the gas as it is pumping, until finally, that valve gives out altogether.
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Old 05-31-2020, 07:39 AM   #6
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Default Re: Y block fuel pump

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These days you might be better off rebuilding your pump. Legal disclaimer: I am not the seller and have no connection to him.

https://www.ebay.com/itm/1955-1956-F...-/382421755928

Or you could just go electric. If you want to keep the original look you could gut your bad pump so that it just passes fuel to the carb. If you're still running vacuum wipers off a dual action pump that part should still work.
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Old 06-09-2020, 12:29 AM   #7
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Default Re: Y block fuel pump

I have been running FE ( 390 ) fuel pumps on my Y blocks, they are easier to find in the local parts store
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Old 06-13-2020, 05:50 PM   #8
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Default Re: Y block fuel pump

I agree Jim. Thing is though this car belongs to a lady and this car was her fathers car. She is a real stickler for original plus it has the vacuum wipers. I bought a new Carter and went to install Thursday and it don't work. Even tried on the bench and nothing. Sending it back Monday.
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Old 06-14-2020, 12:31 AM   #9
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Default Re: Y block fuel pump

Yeah Sid, I know what you mean needing to keep it original and the Vac. wiper situation. I use the factory style double action pump on my '51 Merc. It is all stock except for the headers and dual exh. the double action pump is a must if driven in the rain.
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Old 06-14-2020, 06:02 PM   #10
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Default Re: Y block fuel pump

I am running my second new Airtek in my '55 now. I expect it will last a few years before trouble starts again. I have one of those clear plastic inline fuel filters ahead of the carb so it is easy to tell if the pump is gurgling and draining.
The filter is Duralast #FF5-16DL for 5/16" fuel line (that's the original fuel line size).
If worse comes to worse, you can always tell the lady that you can install an Airtek, but don't allow the engine to set idle for long periods of time where ethanol sediments build up in the bottom and clog those check valves. Maybe use a premium gas additive. I have been using Lucas Deep Clean injector cleaner, but they also have a product called Lucas upper cylinder lubricant in a smaller bottle and less expensive. Either one is alleged to have the same effect (clean & lube carburators, fuel injectors and valve seats.
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Old 06-15-2020, 07:36 PM   #11
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Default Re: Y block fuel pump

Okay...I put a used pump on the car for the people and it ran great. I get a call about 8 days later that the car wont start. In the meantime I got a new Carter pump. So I go to the peoples house and crank the car for 10 -15 seconds and nothing. Had spark too. So I gave it a shot of fuel in carb. and she started and ran great. I took the car home with me again and installed new pump and it don't work. So I pulled it off and bench tried it and still no work. Put the other pump on and it works. This is where it gets strange now...I let the car set for 3 days and went out to start it pumped gas a few times and pulled choke almost started but did not. So I pull the line off the carb. and crank for about 15 sec. and no pump gas. So I crank with my finger kinda over the outlet line and feel a slight pump suck action on the outlet. Then suddenly it starts pumping gas. Hook up line give a shot of gas in carb. and all is well. Shut car off for a few hours and pull off line to carb. and again no pump gas. But if there is gas in the carb. the pump will start pumping and all is good. So next to eliminate a pinhole in the line I set a container under the car with a line in it to eliminate the tank and line from the tank and still the same problem.So I get my fuel pump tester and crank engine for about 15 seconds and the gauge goes to about 7 lbs pressure then back to about almost 2 lbs suction. This is from the line to the carb. The needle goes back and forth with every stroke. Seems to me the pump should go to 4 or 5 and stay there until released. Although 5 is really pushing the envelope on a ECG carb. Although nany of these replacement pumps are advertised at 5.25 max. Should be more like 3.25 max.
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Old 06-16-2020, 09:52 PM   #12
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Default Re: Y block fuel pump

Typically, I would say that you should never be able to read suction on the fuel pump output line. So, sounds to me that there is a problem with the pump. I doubt the rubber diaphragm is at fault, those rubber diaphragms in the Airtex pumps will withstand an A-bomb explosion. It would almost have to be one of those check valves in the bottom of the inlet chamber.
There's another problem though, and that is her Holley 2110 (ECG) carb is leaking gas out of the float chamber dry after a couple days. If there was enough gas in the carb to start and run the engine for a few seconds, even a partially faulty fuel pump might be able to pump enough gas up to the carb to keep the engine running.
I am not saying you should fix the carb and forget about the faulty pump. The output pressure of a good new Airtex pump might be a little higher than OEM specifications, but it should not be enough to negate the carb float, which would flood the carb immediately. I am running a Ford EBU carb on a 292 Y-block with an Airtex pump and there has never been a problem.
Things to check on the carb: busted power valve (economizer) diaghragm will leak all the gas out of float chamber. Also test to see if the accelerator pump ball check valve is not seating properly in it's hole at the bottom of accelerator pump chamber.
The Holley 2110 ECG (1956) works exactly same as the Ford EBU (1954/55) and Holley 2100 (1955), except the 2110 has bigger throat and larger venturies than the previous years.
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Old 06-17-2020, 10:55 AM   #13
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Default Re: Y block fuel pump

I picked up another new fuel pump from a local auto parts yesterday and now all seems well. I think the used one I had on the car had a bad check valve.
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Old 10-22-2020, 07:01 AM   #14
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Default Re: Y block fuel pump

I bought an Airtek pump a few years ago from O'Reilley's for the '67 Galaxie I had at the time. It worked for one day then quit. Exchanged for another one and it worked for one week. The parts man even admitted that there have been a lot of bad mechanical fuel pumps that have went thru their store lately. I got an electric and there were no problems after that.
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Old 10-26-2020, 04:50 AM   #15
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Default Re: Y block fuel pump

I just got a Carter9350 from Hill's now to install it this week. My old carb has a stop check valve no vacuum on on side. $196.05 including shipping.
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Old 10-26-2020, 07:55 AM   #16
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Default Re: Y block fuel pump

Faulty Airtek pumps seems to be a widespread problem, dare I say a pandemic (airtek19)??

Apparently Airtek has acquired Carter and may be having a transition issue.

Many posters in my 'other' forum have installed an electric pump between the tank and mechanical pump. It gets around crappy pumps and vapour lock.

One guy has wired it to the cigarette lighter and only uses it to start the engine, then runs on the mechanical pump. The electric is the backup.
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Old 10-26-2020, 04:49 PM   #17
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Default Re: Y block fuel pump

I thought there was someone here on Ford Forum that rebuilt fuel pumps with modern fuel compatible parts and could set pressure to Ford specs?
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Old 10-26-2020, 08:56 PM   #18
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Default Re: Y block fuel pump

It's just as likely that an electric pump will have been made in China.
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Old 10-27-2020, 02:07 AM   #19
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Default Re: Y block fuel pump

5851a, CharlieNY is the rebuilder
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Old 10-27-2020, 09:46 AM   #20
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Default Re: Y block fuel pump

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5851a, CharlieNY is the rebuilder
Charlie's email
[email protected]
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Old 10-27-2020, 01:14 PM   #21
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Default Re: Y block fuel pump

Charlie has result several Carbs for my flatheads. He a good friend that can't be beat. He just got a 32 Pickup that he working on when he gets time.
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Old 01-10-2021, 12:27 AM   #22
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Default Re: Y block fuel pump

Now and Then Automotive has the rebuild kits for the older A/C fuel pumps. you can buy the kit or have them rebuild your pump. I have a 56 Thunderbird that the pump went bad on. It took 3 Airtex pumps to get it working. No more new junk fuel pumps for me.
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Old 01-10-2021, 06:20 PM   #23
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Default Re: Y block fuel pump

I got a Carter from Hill's and no good sent it back and they sent all them back where they got them. Now then have the original rebuilt. So keep your old one for rebuilt.
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Old 02-28-2021, 02:25 PM   #24
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Default Re: Y block fuel pump

Apparently, Charlie NY only rebuilds flathead fuel pumps, not Y-blocks.
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Old 03-07-2021, 10:13 AM   #25
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Default Re: Y block fuel pump

Quote:
Originally Posted by Sid View Post
The guy was driving about 35 and car quit. I went to where he was and checked for spark all was good. Pulled fuel line off carb. and cranked engine for about 15 sec. and no fuel. Hooked hose to the fuel line going to tank and gave a little suck and got fuel. Bench tested pump and felt pressure on carb. side but feed side would not suck fuel from a can. Found another pump in my stash and car is running now. BTW that is an expensive pump buying new. Especially the Carter M73066. Airtek is about $100.00 Carter $180.00
On my ford I had an electric pump in the fuel line to prime when she sat for a while and when the fuel pump died ,I don’t like breaking down !
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Old 03-25-2021, 10:12 PM   #26
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Default Re: Y block fuel pump

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Quote:
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I have been running FE ( 390 ) fuel pumps on my Y blocks, they are easier to find in the local parts store
any particular year?
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Old 03-06-2023, 06:19 PM   #27
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Default Re: Y block fuel pump

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Okay...I put a used pump on the car for the people and it ran great. I get a call about 8 days later that the car wont start. In the meantime I got a new Carter pump. So I go to the peoples house and crank the car for 10 -15 seconds and nothing.
Usually, when replacing a fuel pump, I notice that the fuel in the line from the gas tank gets sucked back into the tank so that the fuel line going to the new fuel pump has been cavitated. So, Before attempting to make final connection of fuel line to the pump, I fill the line with gas via the flexible fuel fitting till it overflows, then QUICKLY connect it so it doesn't have a chance to suck back into the tank.
After the pump is installed and all fuel lines are connected, I also fill the fuel line from carb to pump before hooking fuel line to carb. I do this using a clean tuna can with a spout bent in it. That stupid tuna can is one of the most used tools I have (since I also use it to prime the EBU carb after the gas has drained out of it after a few days).
BTW, rebuild kits for Y-block fuel pumps have never been available from the repro parts suppliers. But they are now offering kits for flathead fuel pumps.
AND, if you ask for an FE engine fuel pump, you will get the same part they sell you for a Y-block, but you might only get the single action pump, which is no good if you have vacuum windshield wipers.
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Old 03-07-2023, 07:35 AM   #28
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Default Re: Y block fuel pump

Every new fuel pump I've installed in recent years has put out too much pressure causing me to install fuel pressure regulators. I agree with using FE pumps but even with those you don't know what kind of quality you're getting
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Old 03-07-2023, 06:45 PM   #29
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Default Re: Y block fuel pump

The new pump[s from china allegedly supply 3-1/2 to 5-1/2 lbs of pressure.
The maximum inlet pressure for a Ford EBU, Holley 2100 or Holley 2110 (all pre 1957) is 3-1/2 lbs. So if the pump exceeds that, you are flooding out your engine.
I've had a lot of experience with trying to usde THREE different brands of pressure regulators (the last one being an expensive Holley). None lasted longer than a month (under normal everyday driving conditions).
I was finally able to get the fuel system to work using a bypass line back to the gas tank with an orifice tube ahead of the carb (withoput the need for a regulator).
Incidentally, the 223 I-block 6-cyl is the same pump except with a different actuating lever. If you want to see a Holley 1904 carb blow sky high, just try to feed one with one of these pumps. PITIFUL!
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Old 03-09-2023, 10:56 PM   #30
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Default Re: Y block fuel pump

fordor41, I sent you a pm. let me know if you get it.
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Old 03-10-2023, 01:22 AM   #31
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Default Re: Y block fuel pump

I will try and post pictures of the FE pump I use
Attached Images
File Type: jpg FE 3.jpg (33.5 KB, 21 views)
File Type: jpg Fe fuel pump 2.jpg (43.0 KB, 23 views)
File Type: jpg FE fuel pump.jpg (67.1 KB, 24 views)
File Type: jpg FE4.jpg (29.0 KB, 20 views)
File Type: jpg FE5.jpg (32.3 KB, 19 views)
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Old 03-10-2023, 02:28 PM   #32
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Default Re: Y block fuel pump

Arthur Gould Rebuilder's rebuilds fuel pumps (and water pumps). Located in Mass. Has done a couple for me and the one in use is working very good. He only does USA/Canada/Mexico pumps as far as I know. You will have to ask him about the china pumps.
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Old 03-12-2023, 10:22 PM   #33
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fordor41, I sent you a pm. let me know if you get it.
got it, thanks
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