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| | | | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | In the continuing saga of my 216 re build, the newest problem is serious misses at higher RPM. It idles great at 450 -500 RPM. Have run the engine less than two hours total over two weeks of working on this.
I have checked and replaced the Vacuum advance, timed with a vacuum gauge and checked vacuum out of the base of the carb. I have gauges installed ay both places.
pressure at the manifold is about 17-18,
pressure out of the base is about 14 - 15
New plastic Carb base, Carter YF carb.
checked Timing ball with a light and it does not give me a good setting
During the rebuild, checked the casting numbers to insure all were compatible and designed for the block, insured the timing gears were properly aligned.
Distributor and cap installed correctly and checked several times.. New points, plugs, condenser
Questions are:
- Bad distributor shaft/bushing?
- Coil on the way out?
- Carb issues?
Any thoughts?
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
| | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | | | | | | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | I have a new insulator and will relook the gasket.
Thanks, this makes sense.
Mike
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
| | | | | Joined: Jan 2016 Posts: 246 Shop Shark | | Shop Shark Joined: Jan 2016 Posts: 246 | Tim .....what is the purpose of the cut out`s in the carb gasket ?
1953 chevy 1/2 ton with 3 speed 318 on floor and 1955 235 engine
| | | | | Joined: Sep 2001 Posts: 29,270 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,270 | There is a vacuum port/hole in the base of the carburetor that needs to be open for flow.
There are usually multiple "cut-outs", so that the gasket/bakelite-insulator can be placed in any orientation and the needed opening will line up. | | | | | Joined: Mar 2010 Posts: 10,301 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,301 | Wrong gasket is where my money is.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Jan 2015 Posts: 51 'Bolter | | 'Bolter Joined: Jan 2015 Posts: 51 | What do you mean when you said
"checked Timing ball with a light and it does not give me a good setting" is your timing bouncing around? | | | | | Joined: Aug 2004 Posts: 1,418 ODSS Lawman | | ODSS Lawman Joined: Aug 2004 Posts: 1,418 | What is the condition of your points? Have you inspected the insides of the dizzy?
SWEET Sergeant At Arms: Old Dominion Stovebolt Society BUNS?!?!?!Where we're going, we don't need no buns.....1950 GMC 450 1951 Chevy 1/2-TonThe GreenMachineIn the Stovebolt Gallery | | | | | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | points are new.
Ball is steady, but with advancing the distributor, the problem gets a little better.
I am going to relook the holes, gaskets and passage situation at the base of the carb.
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
| | | | | Joined: Mar 2010 Posts: 10,301 Renaissance Man | | Renaissance Man Joined: Mar 2010 Posts: 10,301 | Clean the new points. A lot of them come with something on the contact surfaces. You can turn the ignition switch on and open and close the points with a screw driver to see the spark at the contact surfaces.
1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission
| | | | | Joined: Dec 2003 Posts: 1,061 'Bolter | | 'Bolter Joined: Dec 2003 Posts: 1,061 | I have done that. I worked through some spark issues earlier.
Thanks though.
1946 1-ton Panel
1952 1-ton Comml. W/Grain Body
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