Ford 641

Jim Kietz · Jul 4, 2013

I have a Ford 641 Workmaster that starts and runs fine until it warms up a little, then it starts to spit and sputter with no power at half throttle and above. Any suggestions? Thanks

JD Seller · Jul 4, 2013

A break down in the ignition system. It could be the coil, condenser,maybe even bad spark plugs or even a key switch. I would bet that your spark is breaking down under load hot.

Could also be vapor locking. Does it do it worse when the temperature is higher??? Fords usually did not have too much of an issue with them vapor locking.

old · Jul 4, 2013

When it starts to do that stop and check the spark. Also check and make sure the coil is not so hot as to not be able to touch it for say a 2nd or 2. Or is the bottom of the coil is popped out. Is this a 6 volt or 12 volt system if 12 volt maybe the person who switched it over did not use a ballast resister or 12 volt coil and that would cause a problem after a good number of hours of run time

36 Coupe · Jul 4, 2013

Wrong spark plugs or bum condenser.

Ford 641

Jim Kietz

New User

JD Seller

Well-known Member

old

Well-known Member

36 Coupe

Well-known Member

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