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New Carb Revving HIGH! PICTURES |
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Brad2192 
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Joined: Aug/26/2018 Location: Rhode Island Status: Offline Points: 26 |
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 Topic: New Carb Revving HIGH! PICTURESPosted: Aug/29/2018 at 7:31pm |
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Just threw on my factory new O-1756 Carb... As soon as I turned it on it revs all the way up. On a related note this part fell out of the original carb.. Assuming it is a piece to control fuel flow, can some please tell me where this goes on the new carb? Thank you in advance!
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tyrodtom
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Joined: Sep/14/2007 Location: Virginia Status: Offline Points: 6213 |
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Posted: Aug/29/2018 at 7:47pm |
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That's the needle valve, and yes, it controls fuel flow to the float bowl.
What i'm wondering, is how did this fall out of the carb. ?
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66 American SW, 66 American 2dr, 82 J10, 70 Hornet, Pound, Va.
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FSJunkie
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Joined: Jan/09/2011 Location: Flagstaff, AZ Status: Offline Points: 4742 |
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Posted: Aug/29/2018 at 8:42pm |
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You're new to carburetors, aren't you.
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1955 Packard
1966 Marlin 1972 Wagoneer 1973 Ambassador 1977 Hornet 1982 Concord D/L 1984 Eagle Limited |
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purple72Gremlin
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Charter Member Joined: Jul/01/2007 Location: Illinois Status: Offline Points: 16611 |
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Posted: Aug/29/2018 at 8:53pm |
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Thats the needle as to the float (needle and seat)....and before you go any further, you better find someone that knows about old cars to help you set that carburetor. When they are cold the choke may make it rev higher than it would when warm
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Sonic Silver
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Joined: Nov/23/2011 Location: East Tennessee Status: Offline Points: 7949 |
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Posted: Aug/29/2018 at 9:00pm |
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purple72Gremlin
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Posted: Aug/29/2018 at 9:14pm |
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And I just thought of this, do you have a TSM for this car? TSM means the factory service manual, it will have pictures, and all the specs as to what your car is supposed to be set at...
If you dont know how a carburetor works, you will need a basic understanding so you can work on it ... I suggest you read about carburetors, maybe youtube, and there is information. Another thing is your car has points and condensers, and an older person or a mechanic in his mid 50s will know or should know..... |
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tomj
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Joined: Jan/27/2010 Location: earth Status: Offline Points: 7544 |
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Posted: Aug/29/2018 at 10:07pm |
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if it revs out of control after you start it, without your foot on the gas etc -- check the throttle linkage. you should be able to puzzle out how it works without the manual, assuming it's assembled more or less correctly. it should snap back to the idle position when you let go. if it sticks, or stays in any position, it's AFU. it's possible that the fast idle business is set crazy high. carburetors are frustratingly simple and subtle. first time around you should literally go by the book. there's a bunch of gasoline in there. if it pumps all over the place you can easily have a carb fire that turns into a garage fire, etc. you can puzzle them out yourself, but you really need to RTFM the basics of how they work -- they are nearly all the same in function -- or you'll drive yourself crazy. keep in mind that carburetors are literally analog computing devices. with air flow, wet emulsions, Bernoulli principle (same one that makes airplanes fly, really), levers and springs and calibrated holes. but what you're trying to do is just assembling a pre-made puzzle and tweaking it to correct. but you'll have to read how carbs work or you'll not get anywhere useful. |
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1960 Rambler Super two-door wagon, OHV auto
1961 Roadster American, 195.6 OHV, T5 http://www.ramblerLore.com |
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PHAT69AMX
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Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5919 |
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Posted: Aug/29/2018 at 10:08pm |
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This is a joke, right ?
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Brad2192
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Joined: Aug/26/2018 Location: Rhode Island Status: Offline Points: 26 |
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Posted: Aug/30/2018 at 5:45pm |
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I figured it out myself luckily. Guys, I'm 26. And I'm not going to pretend to be a know it all. Didn't come with here with a false ego because my Daddy didn't love me enough, so ya'll can chill out. I've used these before, but I have not encountered any in the shape of a triangle. This is my first AMC project, thank you to all that were helpful. And the others may need to reevaluate their life choices if they thought spending time on a snarky remark to get their willies off was really worth it.
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purple72Gremlin
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Charter Member Joined: Jul/01/2007 Location: Illinois Status: Offline Points: 16611 |
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Posted: Aug/30/2018 at 6:35pm |
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FSJunkie wrote: