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Missing when engine reaches operating temp

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Old Jun 26, 2008 | 08:28 PM
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Missing when engine reaches operating temp
I have a 94 f150 with the 300 six. It runs fine when it first starts up but when it reaches operating temp it starts missing so bad it can't be driven. Could this be the coil?
 
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Old Jun 27, 2008 | 12:01 PM
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How long since it had a tune-up? Plugs, wires, fuel filter? Have you checked for any error codes? You can find out how to do that at fordfuelinjection.com
 
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Old Jun 27, 2008 | 01:27 PM
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Don't think it would be the coil. If you had a multimeter you could ohm the coil cold first then ohm again when its running crappy.
 
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Old Jun 27, 2008 | 09:05 PM
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truck has new plugs, wires, distributor car, coil, and fuel filter. still does the same.
 
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Old Jun 28, 2008 | 08:47 AM
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Pull some plugs and see what color they are. Should be a tan color. It might tell if it is a fuel problem.
 
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Old Jun 28, 2008 | 09:54 AM
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what kind of plugs and other parts?
 
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