motor keeps dying
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Freshman User
Joined: Oct 2011
Posts: 28
Likes: 0
motor keeps dying
I have a 50 F1 with a 53 Merc Flathead V8. I can start the car fine and it idles great. I can get in and drive it for about 5 minutes and then the motor dies. If I wait about 15 minutes then I can start it up again. The car is a 6 V with a generator. I put in a new battery, generator and voltage regulator. Does anyone have any idea why it keeps dying when I drive it. Thanks
Senior User
Joined: Aug 2008
Posts: 414
Likes: 0
From: Lady Lake FL
Don't know a whole lot about the flathead V8, but on my old Model A it seems like the current gasoline (with ethanol) tends to vapor lock alot. I never had that problem before they started mixing ethanol with the gas. Other issue that comes to mind might be something in the distributor but I would say it is the gas vapor locking.
Paul
Paul
Laughing Gas
Joined: Nov 2008
Posts: 914
Likes: 51
From: SW Missouri
A huge likely hood your coil is bad. They will fire fine and as they get hot they begin to short to ground and that will kill your fire, After they cool they will restart and run a period of time until they get hot again. You can test to be sure when it dies remove a plug wire and crank the engine. If it fires with a tiny spark or a yellow spark replace the coil.
If you have a good bright blue spark with a snap you can look down the throat of the carb and give the throttle a couple of pumps and see if fuel squirts. If so you need to look elsewhere.
Hope this helps.
Opinions will vary
Larry
If you have a good bright blue spark with a snap you can look down the throat of the carb and give the throttle a couple of pumps and see if fuel squirts. If so you need to look elsewhere.
Hope this helps.
Opinions will vary
Larry
Elder User
Joined: Feb 2012
Posts: 948
Likes: 0
From: Central Oregon
I have had problems with other vehicles (motorcycles, particularly) that will pull a vacuum if the tank vent is plugged. Easy way to tell is remove the gas cap after it dies. If you hear air rushing into the tank, it isn't venting, which starves the fuel pump.
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Fleet Mechanic
Joined: Feb 2009
Posts: 1,662
Likes: 36
From: Las Vegas NV
I had the exact same problem til these fine gentlemen told me to check and clean the tank and fuel lines..
I found a soda bottle cap in my tank and a bb gun pellet(plastic) obstructing my fuel outlet.
Also my lines were full of junk.
I found a soda bottle cap in my tank and a bb gun pellet(plastic) obstructing my fuel outlet.
Also my lines were full of junk.
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