| 37coop | -- 04-08-2013 @ 12:30 PM |
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h*llo, further to my recent post regarding the fuel pumping problem with my recent 51 F1 u.k import.i have left emails at several suppliers with the hope of being able to purchase the elusive 8BAfuel pump rod and bush.in the meantime i am trying to fix the existing problem with the current 12 volt pump system .the carb floods and the pump continues to click(pump)so i took advice from the forum and bought a pressure regulator and set it to 41/2 lbs,it still floods .i have tried 3 carbs and reduced the pressure to 31/2 and they still flood ,one of the carbs is from my 39coupe which works perfectly on the 39 with the original manual pump...i cant work this one out ,i guess its the pump which appears fairly new but i would have thought the regulator would have done the job ...any ideas , thanks jim.
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| rotorwrench | -- 04-08-2013 @ 1:01 PM |
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I sounds to me like the float valve isn't shutting off the flow as well as it should. The fuel pressure has to be low for the all metal float needle valve to work properly as someone evidently has already clued you in on installation of a pressure regulator. There may be a problem with the seat or your power valve might be leaking.
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| 37coop | -- 04-08-2013 @ 1:50 PM |
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thanks rotor ,i also thought that to be the obvious answer but the fact three carbs including one tested to be good in my 39 are all flooding with pressure of three and a half psi makes me scratch my head ,i put all three carbs in a bowl and linked to the pump so i could see where the gas was going instead of the gas going in the sump, many thanks jim.
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| supereal | -- 04-08-2013 @ 2:45 PM |
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I'd suspect that your electric pump is not automatically shutting off when the float needle is closed. We use the in line pump sold by C&G, and have never had your problem. The old Delco pumps used to swamp the carbs. We have never had to install a pressure regulator with the Airtex pumps.
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| Big Red 51 | -- 04-08-2013 @ 3:10 PM |
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Bob, I bought two9597 double action Airdtex in the last six months and they both put out around 7 to 8 lbs. The first one blew out the power valve so put a reg in till I can put something in thee line to slow it down for showing. I was really surprised. Don H
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| supereal | -- 04-08-2013 @ 5:16 PM |
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As said, I haven't had any problems. We buy them from C&G and just put them in the fuel line near the tank. I can hear them slow down and stop when the carb is full. There are two types, one each for 12 and 6 volts. When my fuel line plugged with dirt and rust, the electric got e home. Otherwise, I use it to fill the carb after overnight .for longer than overnight
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| 37coop | -- 04-09-2013 @ 2:49 AM |
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thanks for your help all , i think i,ll go the c&g route and buy a new pump,i was even thinking of a new carb but so expensive with the shipping plus taxes in the uk and it possibly wont solve the problem,i,v emailed 4 suppliers as reccomended by forum members regarding the availability of the fuel pump pushrod and not a reply from any of them yet,the route i will take is ...another fuel pump from c@g and when and iff i can get another pushrod i will use the electric pump on a switch as backup...so frustrating ,i,v had my truck over a week now and it hasnt turned a wheel under its own steam , thanks folks,i,ll post at a later date to let you know how it panned out , cheers jim.
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| Big Red 51 | -- 04-09-2013 @ 6:50 AM |
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Jim, Just talked with the DC guys, they have the fuel pump rods and bushings in stock, however, the metal is too soft so they are not shipping them out and are trying to get another supplier. Sounds like Chinese metal to me. Guess you will have to go with the electric pump for now. Bob; I was talking about the Airtex mechanical double action fuel pumps which have the 7 to 8 lbs of pressure. Checked with two known good gauges. One pump was from C&G. I also talked with a tech at Airtex who said they don't check the pressure output before they ship and, furthermore, he said they don't have a way to check the pressure anyway. I was very surprised to hear him say that. With as many new pumps that they ship, you would think they would rig a simple way to check the output pressure. I am looking for a way to reduce the pressure output down to around 3 lbs without using a regulator( for show purposes). I guess I could shorten the stroke by putting a piece of leather in the pump cap. Think that would work to bring it down to 3lbs or so? I have already blown out one KenCTs good power valves in the 94 carb. Don
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| 37coop | -- 04-09-2013 @ 7:12 AM |
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thanks all , I,v just ordered a 12 volt pump from c&g as advised(before I got back onto the forum) in the catalogue it just states 12 v or 6v it doesn't give any info regarding brand or pressure etc but as they were the only choice I,m guessing they are airtex as mentioned by super . I got a message back from carpenter regarding the pushrod and they stated the same reason as don got from dc ..the metal wasn't hard enough so they have been backed and awaiting a further delivery,also an email from joblot saying a waiting of around 2 months ,I,m pleased that eventually I can get one,if I can crack on using the electric pump system till then that will do nicely.....don ..I didn't quite understand when you said about the,,airtex mechanical double action pump..by mechanical do you mean non electric? and what is the double action?...and what pressure can I expect from the pump I,v just bought?although I,m prepared to use a regulator, thanks again , this forum has been fantastic , I,v been in the club near on 30 years with a short break and never used it before , cheers ..jim.
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| ken ct. | -- 04-09-2013 @ 9:02 AM |
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Didn't it sink in yet your running too hi a pressure. try 2#. ken ct.
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| 37coop | -- 04-09-2013 @ 9:32 AM |
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ken...no it didn't "sink in" because I was told by members of the forum that the pressure should be between 31/2 to 41/2.....I,m on this forum because I don't know the answers jim.
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| Big Red 51 | -- 04-09-2013 @ 9:37 AM |
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Yes Ken, It sank in last summer when the new Airtex dbl action pumps were putting out 7-8 lbs which is why I had to install the regulator which I set at 2-2.5 lbs and all runs well. I just want to get the pressure down so I can run the stock pump without a regulator and also satisfy the judging rules. You know a way to run a 7lb pump without using an inline regulator between the pump and carb??
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| 37coop | -- 04-10-2013 @ 12:13 PM |
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just the final part of this topic ...I took off the old 12 volt pump in readiness for the new pump coming from c&g and the old pump is rated at 5.5 to 9psi so I guess its just too powerfull...thanks all for your help , jim.
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| Big Red 51 | -- 04-11-2013 @ 1:42 AM |
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Jim, First, the double action pump is simply a combination fuel pump and vacuum booster used on cars with Fordomatic or Overdrive transmission. Sounds like you will need a fuel regulator for the high output pump you are getting. Good Luck, Don
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| 37coop | -- 04-11-2013 @ 2:14 AM |
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thanks don , the pressure I quoted is for the pump I took off , the one I,m getting from c&g(as recommended by supereal) I don't know the pressure, I,v got a regulator so if needed I will use it , .I,m just booking my flights from u.k to the taho june meet ,been a grim winter over here and looking forward to a change of scenery ,cheers jim.
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| ken ct. | -- 04-30-2013 @ 10:50 PM |
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Evidently it still hasent sunk in. 3 1/2# is about the MAXIUM these carbs will take. 2# is a more realistic pressure.Try it you will like it.Ive rebuilt hundreds of ford pumps in the past 25 yrs and only FORD ones. Ken Ct. "kens ford carburetors" an PUMPS ////
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| ken ct. | -- 04-30-2013 @ 11:01 PM |
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Coop,i can get a pump over to you in Taho by a friend whose driving a 34 to there in June. This is a single action one you need i assume.All i need to know is weather you need the small inlet-outlet of 1/8" pipe thread or the bigger 1/2x20 thread [like the carb threads] ken ct. price would be $75 no core needed. I also install a pleated paper filter in the bowl N/C. ken ct. usa.
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