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| Hardcoreaireng Carburetor Question https://slantsix.org/forum/viewtopic.php?t=39531 |
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| Author: | hardcoreaireng [ Mon Mar 22, 2010 9:55 pm ] |
| Post subject: | Hardcoreaireng Carburetor Question |
This my first post, but the instructions thread helped me quite a bit. I own a 1970 International Scout. It has a 232 cu in Slant 6 and a Holley 1920 carburetor. I rebuilt the carburetor, installed new plugs and wires. I took off to distributer cap and cleaned that filthy mess, and afterward sprayed it with WD-40 so that the vacuum advance would function. I installed a new PCV and hose, and new vacuum lines to replace the ones that were installed previously. I followed your instructions and she seems to idle perfectly now. Thank you for that. However, as soon as i increase the throttle, there is a moment of lag, and if I am in gear and attempting to drive, she will stall. If I ease into a roll, she doesn't stall. I believe that my problem is vacuum, however, I can't tell where everything is supposed to be hooked up. All of the photos that I have seen of the 1920 have only one vacuum port at the bottom of the carb. Mine has two. They are both in the same vicinity of where I see them in the drawings. One is on the lower left of the face and it has no bend. The other is on the upper right of the face and has a slight upward bend. I have a photo, but can't seem to post it here. Which one should go to the vacuum advance on the distributor? Where should the second one be connected? Lastly, where should my dashpot be connected? There is a vacuum tree on the intake manifold, but both ports are plugged. My other idea, is that the pump operating lever is not touching the the pump when at idle. I tried routing the lever through all three points of adjustment, but they all seem to create the same clearance of about 1/8". Any help would be greatly appreciated. |
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| Author: | hardcoreaireng [ Tue Mar 23, 2010 4:54 pm ] |
| Post subject: | |
Dan, Did you happen to read my first post on the first page of this thread? I could really use your help. |
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| Author: | ceej [ Tue Mar 23, 2010 5:06 pm ] |
| Post subject: | |
Created a new thread for your question. You may need to revisit your accelerator pump adjustments. Pretty classic symptom with your stall. CJ |
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| Author: | SlantSixDan [ Tue Mar 23, 2010 6:24 pm ] |
| Post subject: | Re: Hardcoreaireng Carburetor Question |
Quote: This my first post
Welcome on the board!Quote: own a 1970 International Scout. It has a 232 cu in Slant 6 and a Holley 1920 carburetor.
H'm. Unless it's a modified engine (overbored 0.055" or stroked) it's not a 232 slant-6. No such engine. 225, yes. There was an AMC 232 Six, but it wasn't slanted.Quote: I rebuilt the carburetor, installed new plugs and wires. I took off to distributer cap and cleaned that filthy mess, and afterward sprayed it with WD-40 so that the vacuum advance would function.
Sounds like you need a new distributor cap at least, and probably some other new distributor parts (or just a whole new distributor). Tune-up parts and technique suggestions in this thread. Quote: However, as soon as i increase the throttle, there is a moment of lag, and if I am in gear and attempting to drive, she will stall. If I ease into a roll, she doesn't stall.
Probably faulty accelerator pump. With the engine off and the air cleaner lid removed, peer down into the carburetor as you operate the throttle lever. You should see a good strong shot of fuel squirting into the middle of the carb throat each time you operate the lever. If no shot (or a weak/piddly one) you've got accelerator pump problems. Maladjusted or missing linkage, missing pump drive spring, broken or worn pump operating cam, missing pump check ball in the main metering block of the carb (or pump check ball seat so badly corroded it no longer seals)...Quote: All of the photos that I have seen of the 1920 have only one vacuum port at the bottom of the carb.
There are many variants of the 1920, with different vacuum connections. What specific carb are you working on? Look at the top or front face of the main casting, near the fuel inlet, and find the type number. It is a 4-digit number, sometimes with the word "LIST" near it. Quote: I have a photo, but can't seem to post it here.
Instructions for posting photos are here.Quote: Which one should go to the vacuum advance on the distributor?
Vacuum connections are designated in the Holley 1920 manual available for free download in this thread. Quote: Lastly, where should my dashpot be connected?
A dashpot doesn't get connected to anything. It doesn't have a vacuum fitting or hose. Are you talking about the choke pull-off? Again, use the pictures in the Holley 1920 manual to make sure you're asking about the right component.Quote: My other idea, is that the pump operating lever is not touching the the pump when at idle.
A photo is worth a couple thousand words here.
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