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EFV-8 Club Forum / General Ford Discussion / Starting issue after car warm

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Parkopup1218

07-21-2020 @ 2:44 PM

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Hello All
Here is my opportunity. I have a 1942 Ford Coupe with a 1946 59ab motor. The motor recently has gone through carb rebuild, new wires and plugs, dist rebuild, new wire harness from the firewall to the radiator forward. This is a 6 v pos ground car. The starter was bench tested and all ok. The battery is new and when testing charging, static is around 6.7 and charging around 6.9 or so. The car runs great. MY QUESTION: When cold, the car starts right up. After it warms up (around 20-30 minutes driving) and shut off, it is hard to start. When I place the batt charger on, it starts off register with 6.4 so not dead by any means. After several hours on the charger and cooling down, the car starts right up. Thoughts?
Thanks for your input!!!!

carcrazy

07-21-2020 @ 4:08 PM

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Are you using the stock ignition system? The coil may be getting weak and unable to provide adequate spark once it warms up.

07-21-2020 @ 4:14 PM

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Check, clean and tighten your battery connections and all grounds....

ford38v8

07-21-2020 @ 5:31 PM

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This is a common issue, and although more prevalent in recent years due to changes in fuel formulation, it's not new by any means. What's happening is heat soak after shutdown, causing the fuel in the carburetor to percolate. When this happens, you'll either have no fuel to start, or too much, as the engine can be flooded from the overflowing fuel bowl.

A quick and easy confirmation is to raise the hood immediately upon stopping to allow excess heat to escape the engine compartment. I'm not suggesting this as a cure, only to narrow the field in your search for answers.

Alan

Parkopup1218

07-21-2020 @ 6:00 PM

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Yes I am I using stock parts.
I will check the coil...thanks

Parkopup1218

07-21-2020 @ 6:01 PM

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I will try the hood suggestion. Thanks

50CaPU

07-22-2020 @ 5:02 AM

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A handheld infrared thermometer will show your actual temperatures around the fuel bowl, carb, etc.

Tim
Downtown, Ca

TomO

07-22-2020 @ 7:09 AM

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You checked the battery when you were having starting problems. I would like to know if your starter turns over the engine just as fast ho and cold or does it crank slowly when hot? I would also like to know who rebuilt your carburetor.

To check for the condition that Alan spoke of, shortly after you stop the engine, remove the air cleaner and look down the throat of the carburetor, if you see fuel dribbling down into the carburetor, wait until the engine cools and remove the top of the carburetor and adjust the float so that the fuel level is 1/8" lower than its current level. This should not affect performance.

Tom

Parkopup1218

07-22-2020 @ 12:26 PM

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Hi Tom
The starter is slower when warm.
The carb was rebuilt by a local mechanic who specialises in old 40's and 50's

alanwoodieman

07-22-2020 @ 2:35 PM

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slower when warm--check out battery cable, make sure they can handle the start load generated by a hot engine. when you try to strat hot see if the cable to starter gets really hot--if so you need a bigger cable

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