73 Ambassador 2 Barrel Carb

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   I'm working on getting a 73 Ambo running and driving after sitting for 15 years. I got the car to idle, albeit rough, but whenever I go to hit the gas pedal, it sounds like it's getting way too much air and not enough fuel and then stumbles. Usually it dies after a hard press of the gas. If I close the choke plate on the carburetor, I can pull on the throttle by hand and it revs just fine after that. I tried lubricating the linkage for the choke plate, then pressing it down until I hear it sort of "snap" closed, but it always opens back up. Any idea how to remedy this? Or is a carb rebuild in the works? It appears to be the factory carburetor, a 2 barrel with the AMC tag on it, but I'm not sure what exact model it would be to order a rebuild kit. Anyone have some ideas so I can get the project moving forward?

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SeanHatfield Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Nut Joined: Oct/15/2015 Location: Plymouth, IN Status: Offline Points: 459	Post Options Post Reply Quote SeanHatfield Report Post Thanks(0) Quote Reply Topic: 73 Ambassador 2 Barrel Carb Posted: Sep/20/2018 at 10:42am
	I'm working on getting a 73 Ambo running and driving after sitting for 15 years. I got the car to idle, albeit rough, but whenever I go to hit the gas pedal, it sounds like it's getting way too much air and not enough fuel and then stumbles. Usually it dies after a hard press of the gas. If I close the choke plate on the carburetor, I can pull on the throttle by hand and it revs just fine after that. I tried lubricating the linkage for the choke plate, then pressing it down until I hear it sort of "snap" closed, but it always opens back up. Any idea how to remedy this? Or is a carb rebuild in the works? It appears to be the factory carburetor, a 2 barrel with the AMC tag on it, but I'm not sure what exact model it would be to order a rebuild kit. Anyone have some ideas so I can get the project moving forward?

304-dude Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9082	Post Options Post Reply Quote 304-dude Report Post Thanks(0) Quote Reply Posted: Sep/20/2018 at 10:46am
	Rebuild the carb. Today's gas is bad on old gaskets and all. I sold my 2bbl from my 71 Javelin, as a rebuilder, even though it was a runner when I dismantled the engine. Just because is had sat 10 years and all. I think your carb Is the same model 2100 as what what I had.https://www.carburetor-parts.com/Motorcraft-2100-Carburetor-Kit-AMC-Jeep_p_697.html
	71 Javelin SST body 390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker

Trader Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: May/15/2018 Location: Ontario Status: Online Points: 6917	Post Options Post Reply Quote Trader Report Post Thanks(0) Quote Reply Posted: Sep/20/2018 at 5:43pm
	Inspect the accelerator pump bore when rebuilding. Many that sit will corrode at the pump plunger. If there is a small lip then it can be bored a little oversize and still work, sleeved or just replace with a re-manufactured or new carburetor. New carburetors are made with alloys that can take up to 15% or more ethanol so that would be a consideration.

SeanHatfield Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Nut Joined: Oct/15/2015 Location: Plymouth, IN Status: Offline Points: 459	Post Options Post Reply Quote SeanHatfield Report Post Thanks(0) Quote Reply Posted: Sep/21/2018 at 5:23am
	Thanks guys! I’ll definitely look at the accelerator pump when I rebuild it. The plunger seemed to be operating fine, but there’s no guarantee that it’s not rotten down inside the carb. When I get some time, I’ll verify the tag on the carb to make sure i’m ordering all the right gaskets and start with a rebuild. I haven’t taken apart a carb in quite a few years and the last one I did was a small engine carb, so this tedious process might take me a little while. Haha. Still lots to learn on these cars and plenty of time (for now) to learn some more!

232jav3sp Members Profile Send Private Message Find Members Posts Add to Buddy List AMC Addicted Joined: Jan/09/2013 Location: Texas Status: Offline Points: 2451	Post Options Post Reply Quote 232jav3sp Report Post Thanks(0) Quote Reply Posted: Sep/21/2018 at 2:15pm
	If need be, I have a good Motorcraft 2100 carb core. Came off of a 304. The Emulsion tubes have some hairline cracks in them, but, should still work. There may be a manufacturer out there to replace them, but, not too sure. if things don't work out for you on your carb let me know; I might be willing to rebuild this carb and sell.