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Discussion Topic:
Running Rough When Hot
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TomO |
05-14-2012 @ 7:26 AM
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Senior
Posts: 7256
Joined: Oct 2009
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Another check for a restricted exhaust is the vacuum gauge. See scenario 14 on this site: http://www.secondchancegarage.com/public/186.cfm How hot does your engine get, while driving?
Tom
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keith oh |
05-13-2012 @ 7:52 AM
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New Member
Posts: 116
Joined: May 2010
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Check to see (even if you do not have a radio) the spark plug and coil wires have been at some time changed to radio noise resistor carbon wires. These eventually break down and cause problems such as you describe. Sometimes they are so bad you will see sparks following the wires in the dark.
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supereal |
05-13-2012 @ 6:33 AM
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Senior
Posts: 6819
Joined: Oct 2009
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Check for an exhaust restriction, such as a muffler full of carbon and rust. Tap it with a hammer. If it clunks instead of pings, chances are it is plugged. I've seen mufflers so packed that you could hardly lift them. A restricted exhaust will cause the carb to get very hot because the passages in the intake manifold direct much of the excess exhaust, and it boils the fuel.
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40 Coupe |
05-13-2012 @ 4:08 AM
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Senior
Posts: 1678
Joined: Oct 2009
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One of the easiest things to change is the condenser. Many times they change value and will go bad when they are heated, and when cold they perform properly. If you have the 37 coil NAPA sells one FA49. If the engine runs well when it first reaches running temperature then it does not sound like a carburetor problem. When the car acts up and stalls check that there is fuel in the carburetor and the accelerator pump produces a strong flow of fuel to the engine. If not the problem could lie in the fuel delivery to the carburetor.
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doning |
05-12-2012 @ 6:29 PM
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New Member
Posts: 158
Joined: Nov 2009
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I'm sure this has been posted before but I'm having quite the issue with my '37 fordor! When the engine starts getting hot on a warm sunny afternoon drive by the time I can get it back home the engine is bearly running and it sounds like it has a heavy cam in it. Eventually it will shut off on it's own. It runs excellent when cold. I installed a Skip coil, new condenser, and the generator is charging at 10 amps while driving. Does this sound like a carb problem then? Tomorrow I'll pull the plugs and see what they look like. I do know that when I get home I'll lift the hood and the carb is so hot you can't even touch it. It's like touching an exhaust manifold! Any ideas? Thanks Guy's! Don
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