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64 american wagon hard start after warm up |
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sowhasumo
AMC Fan Joined: Jun/29/2014 Location: PA Status: Offline Points: 12 |
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Posted: Aug/25/2014 at 10:18pm |
Recently purchased a 1964 rambler American 330 wagon,32000 original miles, runs great after being parked for 10 minutes it is so hard to start, I suspect vapor lock,I was considering installing a Rochester 2g on the Lhead engine, someone recommended an electric fuel pump for the problem. anone have any Ideas??
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rocklandrambler
AMC Addicted Joined: Feb/09/2013 Location: Nanuet, NY Status: Offline Points: 3953 |
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It could be all manner of things other than vapor lock. Weak battery, cables needing replacing, starter going bad, etc. Does your car have a two-barrel head now. How would you put a Rochester 2GC on it. In my own opinion you do not need an electric fuel pump.
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Past AMC's
1974 Hornet X (new) 1975 Gremlin X (new) 1964 Classic 660 Cross Country 1965 American 440-H |
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tyrodtom
AMC Addicted Joined: Sep/14/2007 Location: Virginia Status: Offline Points: 6213 |
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I understand you have the flathead.
The flathead has the fuel line between the fuel pump and carburetor running very close to the exhaust manifold, if that has been bent out of position, or even in it's stock placement, it's prone to vapor lock in that section of fuel line. Move that fuel line away from the exhaust manifold, and insulate it. |
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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sowhasumo
AMC Fan Joined: Jun/29/2014 Location: PA Status: Offline Points: 12 |
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I have a 1barrell to 2 barrell adapter
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uncljohn
AMC Addicted Joined: Jan/03/2013 Location: Peoria AZ Status: Offline Points: 5394 |
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Personally after some almost 60 years of fixing and driving my own cars and the last 15 of them living where 1/3 of the year it is over 100 degrees I can pretty much say I have had one verified case of vapor lock and that was when I was using a cheap cut rate source of alcohol diluted gasoline. And that was on a port injected 3.8 Liter Oldsmobile.
So I would be pretty sure vapor lock is about the last problem you would have. Doesn't that engine have a carburetor that bolts into a plate that is part of the cylinder head? I suspect that possibly there is some perculation going on with the carburetor sitting where ever it sits if that is the case. I'd check to see if the carburetor is properly mounted and that the fuel pump is actually any good. And also see if the rubber hose that connects the gas tank to the fuel line is not full of cracks and such and sucking air through it. But then again. I dunno, it just seems to me that if I don't see vapor lock problems at 110 degrees in Phoenix, I would not expect to see many of them in PA. |
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70 390 5spd Donohue
74 Hornet In restoration 76 Hornet, 5.7L Mercury Marine Power 80 Fuel Injected I6 Spirit 74 232 I-6, 4bbl, 270HL Isky Cam |
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tyrodtom
AMC Addicted Joined: Sep/14/2007 Location: Virginia Status: Offline Points: 6213 |
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This is a L head, flathead.
The carb bolts direct to the cast iron head. The carb, fuel pump, and exhaust are all on the right side of the engine. The fuel line between the pump and carb. goes just a inch or so to the right of the exhaust manifold. Not a good combination even when it was new. I had a 59 American flathead many, many years ago, and it suffered from vapor lock until I bent that fuel further away from the exhaust AND insulated it. Try that simple fix first before you go to drastic measures. Edited by tyrodtom - Aug/26/2014 at 5:08pm |
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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farna
Supporter of TheAMCForum Moderator Lost Dealership Project Joined: Jul/08/2007 Location: South Carolina Status: Offline Points: 19676 |
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Simply using a rubber fuel line in place of the metal line will most often cure a vapor lock problem. The rubber doesn't heat up and boil fuel.
I never had vapor lock when in Idaho, but drove the car I had at the time to Ohio one year and it suddenly started vapor locking. This was in the early 90s, before alcohol in fuel. Still, fuel blends differ across the country, and altitude and humidity also have an affect. I got frustrated the second time I stopped for fuel and had to push the car out of the way and wait 25-30 minutes to drive off. Saw a hardware store across the street, went over for a mini tubing cutter, rubber fuel line, and a couple clamps. Was driving off in a few and never had the problem again! I drove that car six years before having that vapor lock problem in OH... very annoying! |
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Frank Swygert
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tyrodtom
AMC Addicted Joined: Sep/14/2007 Location: Virginia Status: Offline Points: 6213 |
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It's been a long time ago, but all I remember doing is pushing that fuel line a little further away from the exhaust, then slitting a rubber fuel line, and installing it over the metal line.
Probably replacing the metal line with a rubber one would have worked even better. This was in 1966, and in a hot North Carolina summer. |
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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sowhasumo
AMC Fan Joined: Jun/29/2014 Location: PA Status: Offline Points: 12 |
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OK so I'll give it to you in a nut shell, this weekend installed an electric fuel pump and the Rochester 2g carb on my little wagon, boy did it wake up that L6 engine.
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