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| | | | Joined: Mar 2009 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2009 Posts: 100 | I have a 65 chevy c20 with a straight 6, and i am wondering if all distrubutors have vacuum hoses that go to the carb. I am still having problems with the engine under load and i do not have a hose from the distributor and i have an opening on the carburetor thats not being used. Its next the to fuel air mixture screw.
It's better to have it and not need it, then it is to need it and not have it. "Woodrow F. Call"
| | | | | Joined: Jul 2004 Posts: 5,708 'Bolter | | 'Bolter Joined: Jul 2004 Posts: 5,708 | mswilkes65Chevy,
If your engine has a points distributor equipped with a vacuum advance can then it needs to be connected to a ported tap on the carburetor. I'm guessing this is the case with a '65 six cylinder.
Some carburetors have more than one port but I believe some only have one and again, I'll guess that the little one you found is indeed the tap for the vacuum advance can. Lets see if someone shows up to confirm my guess. That port should be plugged now if there is no hose attached.
Stuart | | | | | Joined: Mar 2009 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2009 Posts: 100 | I cannot find a vacuum point on my distributor, so i guess i should plug this port on the carburetor with a bolt.
Any ideas if this would cause the engine to choke under throtle but run great while ideling.
It's better to have it and not need it, then it is to need it and not have it. "Woodrow F. Call"
| | | | | Joined: Jul 2007 Posts: 461 Shop Shark | | Shop Shark Joined: Jul 2007 Posts: 461 | Your distributor should have a vacuum advance, but it may have been removed. There will be an opening in the side of the distributor for the vacuum advance if that is the case. The original distributors had trouble with the breaker plate connection to ground, and also with shaft bushing wear. Both conditions would cause varying degrees of low-speed engine roughness off-idle and/or when the vacuum advance actuated. Someone may have removed the advance control as a remedy, but leaving the vacuum line off would do the same thing. Neither was a proper repair for the problem- it just covered up the problem.
Your off-idle trouble could be either inadequate accelerator pump discharge, or distributor trouble. Remove the air cleaner, and with the engine stopped, open the choke and work the accelerator linkage for about half-throttle. You should see a strong squirt of fuel as soon as the throttle moves.
Harvester | | | | | Joined: Mar 2009 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2009 Posts: 100 | there are no additional openings on my distributor, i have also noticed when i shut the truck off it continues to expell gas vapors for 10 mins or so.
It's better to have it and not need it, then it is to need it and not have it. "Woodrow F. Call"
| | | | | Joined: Feb 2000 Posts: 5,223 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,223 | Anyway you can get a picture of the distributor for us to see. That would be one special unit not to have a vacuum advance unit on it. The port right next to the idle adjustment screw is were most of the vacuum advance lines hooked up. Joe | | | | | Joined: Mar 2009 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2009 Posts: 100 | thanks joe i will get you some pictures tonight
It's better to have it and not need it, then it is to need it and not have it. "Woodrow F. Call"
| | | | | Joined: Sep 2006 Posts: 841 Shop Shark | | Shop Shark Joined: Sep 2006 Posts: 841 | he said the engine was out of a boat on the other post. i wounder if this has something to do with it. | | | | | Joined: Mar 2009 Posts: 100 Wrench Fetcher | | Wrench Fetcher Joined: Mar 2009 Posts: 100 | it does, i found out the distributor on a boat does not have a vacuum advance. So i have to buy a distributor from a 67 chevy bisycane in order to have a distributor with an advance on it. Its only 37 dollars though. The motor is a 250 ci, which is the same as the orginall 292 that was in the truck; except the block is 2 inches shorter. The components are apraently the same. I am trying to confirm this with relation to the spark plug gap and the points gap settings. any help and all previous help is what makes every one here the best. You guys make this seem relativley easy for a 27 year old guy.
It's better to have it and not need it, then it is to need it and not have it. "Woodrow F. Call"
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