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12-29-2015, 09:02 PM | #1 |
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Ford 94 Carburator Issue?
I hope I'm not wearing out my welcome tonight, but I have another question.
While looking for a place to connect my vacuum gauge I noticed an issue with my rear carb. The circled linkage in the picture below (not my picture) was not connected at the bottom. 2 Questions: 1) What does this linkage do? 2) What happens if it's not connected as mine was. Seemed to run better once I reconnected it but that could just be my imagination. The car left me stranded with what I though was vapor lock the other day. 3rd Question, could this linkage not being connected have caused my problem? Thank again!
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1930 Ford Model Speedster 1959 Alfa Romeo Giulietta Spider 1963 Vespa Motor Scooter 1967 Ford Galaxie 500 Convertible 1977 Dodge M884 Pickup 1999 BMW Z3 Clubs: AACA, HCCP |
12-29-2015, 09:11 PM | #2 |
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Re: Ford 94 Carburator Issue?
That linkage operates the accelerator pump above it. I don't know how essential it is in a two carb set up that sounds like you have. I have no experience with that. Someone who has may tell. I know if it's not hooked up on a solo carb the engine will hesitate and maybe even die with any attempt to accelerate without that little squirt of gas the accelerator pump gives.
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Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” *Ursula K. Le Guin in The Left Hand of Darkness Last edited by Old Henry; 12-29-2015 at 09:24 PM. |
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12-29-2015, 09:15 PM | #3 |
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Re: Ford 94 Carburator Issue?
I have dual carbs recently rebuilt by the best Charlie NY. When I got them back Charlie said if I had a flat spot when accelerating to move the linkage over one spot. So Old HENRY I think your spot on with your reply.
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12-29-2015, 09:26 PM | #4 | |
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Re: Ford 94 Carburator Issue?
Quote:
As adileo said, there is even an adjustment of how much squirt you get with the pump. The linkage can be moved between the three holes on the accelerator lever as shown. The rear hole #1 moves the pump less for less gas and #3 moves it the most for the biggest squirt. I like a big squirt for strongest acceleration so always leave mine at #3. Here's the link that you can get and easily snap it in: http://www.macsautoparts.com/ford_me...-and-2100.html
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Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” *Ursula K. Le Guin in The Left Hand of Darkness Last edited by Old Henry; 12-29-2015 at 09:35 PM. |
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12-29-2015, 11:19 PM | #5 |
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Re: Ford 94 Carburator Issue?
Thanks guys, that explains a lot.
It definitely accelerates smoother with it attached. Now for the $50 question. Could the one on the rear carb being disconnected make the car not run and act as if it was either out of gas or had vapor lock? Furthermore would adding an electric inline fuel pump "fix" the problem when really it was the accelerator pump not being connected? Thanks
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1930 Ford Model Speedster 1959 Alfa Romeo Giulietta Spider 1963 Vespa Motor Scooter 1967 Ford Galaxie 500 Convertible 1977 Dodge M884 Pickup 1999 BMW Z3 Clubs: AACA, HCCP |
12-29-2015, 11:32 PM | #6 | |
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Re: Ford 94 Carburator Issue?
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Quote:
A fairly reliable and easy test to diagnose vapor lock is, when the engine dies, pour water on the mechanical fuel pump to cool it down. If the engine then starts right up it was vapor lock. If not, it could still be vapor lock in the fuel line leading up to the mechanical pump (I've only had that on a 8ba engine in a 51 Custom). More likely, if the engine won't start after cooling down the mechanical fuel pump it is something else.
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Prof. Henry (The Roaming Gnome) "It is good to have an end to journey toward; but it is the journey that matters, in the end.” *Ursula K. Le Guin in The Left Hand of Darkness |
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12-30-2015, 02:59 AM | #7 |
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Re: Ford 94 Carburator Issue?
The accelerator pump is more targeted than Henry states. It only gets used at the beginning of the acceleration, when you mash the pedal. It gives a squirt of neat fuel straight down the carb throat. This overcomes a flat spot that you can have when suddenly opening the throttle. After the first second (or slightly longer, don't know the exact figure), the carb relies on it's jets to deliver the fuel and in this instance, (accelerating), the power valve will be in operation that gives the extra enrichment required when hard acceleration is demanded.
So, the short version is, no, the linkage being disconnected will not cause the issue you describe. If when refitting the link, you still have a flat spot when mashing the pedal, move the links out to the next hole. You have a choice of 3 holes. Both links in the middle hole seems to work for me, but you need to experiment and judge for yourself. You should be able to mash the pedal to the floor and feel instant acceleration. It's amazing how hard you can be on these old cars and they just lap it up. Mart. |
12-30-2015, 08:42 AM | #8 |
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Re: Ford 94 Carburator Issue?
@ Old Henry & Mart: Thanks for the replies.
I'll play around with the hole positions after I get the electric fuel pump installed. I'm 99% sure I have a vapor lock issue. When the car stopped running I checked the tank (almost full) then the carbs (totally dry). I waited until it cooled down a bit and it started back up and ran fine until it got hot again. Took a long time to go 1 mile home. I'm still learning my way around this car. It's my first flathead and it was set up as a race car for the TROG so I'm sure it will need a bit of tweaking. Thanks again!
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1930 Ford Model Speedster 1959 Alfa Romeo Giulietta Spider 1963 Vespa Motor Scooter 1967 Ford Galaxie 500 Convertible 1977 Dodge M884 Pickup 1999 BMW Z3 Clubs: AACA, HCCP |
12-30-2015, 02:29 PM | #9 | |
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Re: Ford 94 Carburator Issue?
Quote:
Professor. How do you change the position? I can't figure out how to take it off? thanks GB
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"you can't make honey out of dog sh*t" "You're a long time looking at the lid" |
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12-30-2015, 03:33 PM | #10 |
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Re: Ford 94 Carburator Issue?
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12-30-2015, 05:13 PM | #11 |
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Re: Ford 94 Carburator Issue?
Thanks Bassman.
RIP Lemmy. Saw him in New Plymouth in 2007, couldn't wait for him to come back but that will never happen now. That Richenbacker sure is a monster too. GB
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"you can't make honey out of dog sh*t" "You're a long time looking at the lid" |
01-07-2016, 11:47 PM | #12 |
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Re: Ford 94 Carburator Issue?
I finally had a chance to play with the carbs.
I moved the Accelerator Pump Link to position #3 on both carbs. HOLY SHIP!!! What a difference in acceleration. It made the car almost like a contemporary car. The links on both carbs are a little loose. Can they be tightened or do I need to replace them? Thanks
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1930 Ford Model Speedster 1959 Alfa Romeo Giulietta Spider 1963 Vespa Motor Scooter 1967 Ford Galaxie 500 Convertible 1977 Dodge M884 Pickup 1999 BMW Z3 Clubs: AACA, HCCP |
01-08-2016, 05:10 AM | #13 |
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Re: Ford 94 Carburator Issue?
Graeme, Probably alot of guys don't know who he is...LOL Yep one of the greatest bass players. R I P Lemmy!
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01-08-2016, 07:15 AM | #14 |
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Re: Ford 94 Carburator Issue?
[QUOTE=vespaholic;1219944]I finally had a chance to play with the carbs.
I moved the Accelerator Pump Link to position #3 on both carbs. HOLY SHIP!!! What a difference in acceleration. It made the car almost like a contemporary car. The links on both carbs are a little loose. Can they be tightened or do I need to replace them? Thanks[/QUOTE As long as the pins are in all the way, your fine. |
01-08-2016, 09:06 AM | #15 |
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Re: Ford 94 Carburator Issue?
@adileo: That's the issue. The one on the rear carb jiggles off when I drive.
Now that being said that was when it was in position #2. We'll see how it goes in position #3 as it feels a little bit more secure.
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1930 Ford Model Speedster 1959 Alfa Romeo Giulietta Spider 1963 Vespa Motor Scooter 1967 Ford Galaxie 500 Convertible 1977 Dodge M884 Pickup 1999 BMW Z3 Clubs: AACA, HCCP |
01-08-2016, 09:41 AM | #16 | |
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Re: Ford 94 Carburator Issue?
Quote:
Oh - take two needle nose pliers and bend slightly inward. Then push back in place. I believe you can also buy new replacements online. |
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01-08-2016, 09:46 AM | #17 |
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Re: Ford 94 Carburator Issue?
OK Thanks
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1930 Ford Model Speedster 1959 Alfa Romeo Giulietta Spider 1963 Vespa Motor Scooter 1967 Ford Galaxie 500 Convertible 1977 Dodge M884 Pickup 1999 BMW Z3 Clubs: AACA, HCCP |
01-08-2016, 01:32 PM | #18 |
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Re: Ford 94 Carburator Issue?
I still believe a lot of Vapour lock problems are a poor performing mechanical pump or air leaks in the line ,hot fuel only escalates the problem .If you insist on a electrical pump here is one of the best out there no pressure regulator needed as its rated at 2,1/2psi solid state Rated for vintage cars .6 volt 12 volt .Ted
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01-08-2016, 01:35 PM | #19 |
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Re: Ford 94 Carburator Issue?
I already bought an inline K&K fuel Pump rated at 1-2 PSI.
I'm putting it on a switch.
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1930 Ford Model Speedster 1959 Alfa Romeo Giulietta Spider 1963 Vespa Motor Scooter 1967 Ford Galaxie 500 Convertible 1977 Dodge M884 Pickup 1999 BMW Z3 Clubs: AACA, HCCP |
01-08-2016, 02:01 PM | #20 |
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Re: Ford 94 Carburator Issue?
I'm no expert but 1 to 2 sounds too low. Especially with dual carbs. I run my duals at 3.
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