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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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#32175 03/23/2004 1:37 AM | Joined: Mar 2004 Posts: 37 New Guy | | New Guy Joined: Mar 2004 Posts: 37 | ok the engine has a fresh rebuild with an offenhauser dual 1 barrel carter setup, I am about to have the carbs checked out by our local carb guy, we can get the car running, but it seems to want to idle at about 3k rpms, and it will only start and stay running if I choke it, any help, anyone? | | |
#32176 03/23/2004 1:49 AM | Joined: Oct 2001 Posts: 130 Wrench Fetcher | | Wrench Fetcher Joined: Oct 2001 Posts: 130 | it sounds like the idle circuits are closed, or a big vacuum leak, or both. good luck.
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#32177 03/23/2004 1:52 AM | Joined: Mar 2004 Posts: 37 New Guy | | New Guy Joined: Mar 2004 Posts: 37 | idle circuits? what about the heat riser, I havent put on the heat riser spring? | | |
#32178 03/23/2004 7:51 PM | Joined: Jun 2000 Posts: 2,773 'Bolter | | 'Bolter Joined: Jun 2000 Posts: 2,773 | The hear riser doesn't directly affect the idle, except when the engine is cold. All it does is warm the intake manifold with exhaust. Without the spring, the valve stays open. When the engine is cold, the spring closes the valve allowing hot exhaust to go to the intake.
Fred
52 3600
69 C-10
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#32179 03/23/2004 10:43 PM | Joined: Feb 2003 Posts: 452 Shop Shark | | Shop Shark Joined: Feb 2003 Posts: 452 | May not help, but my 216had a similar problem. Wouldn't idle less than 1500-2000 RPM, choke on. I checked the plugs and then the points. Gap was WAY off. Once fixed, it idles great when warm.
Current fleet (subject to change w/o notice) \'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run. My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787. Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.
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#32180 03/24/2004 12:03 AM | Joined: Sep 2003 Posts: 324 Shop Shark | | Shop Shark Joined: Sep 2003 Posts: 324 | Had the same problem. Found that the intake manifold was sucking air from the bottom of the gasket. The fix was to grind the manifold. Found that the Fenton hedders were holding the intake at a slight angle and the intake would not fit the head flush. Grinding took place on the bottom of the intake for clearence between it and the headders. Intake sets flush to head and vacuum leak went away. | | |
#32181 03/24/2004 12:38 AM | Joined: Mar 2004 Posts: 37 New Guy | | New Guy Joined: Mar 2004 Posts: 37 | Thats my problem I think, I had the intake/exhaust manifold surfaced at napa, but I think the little rings that go inbetween the intake and head were too thick, I just picked up a new gasket and am going to hopefully get it all back together tomorrow.
Thanks for all the help everyone, I will update on the situation in a day or 2 | | |
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