Thread: 96 Ford F53 460cu in runs rough at operating temperature only.

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Denny,

What bothers me with all of this is that it runs perfect with lots of power when the outside temp is cold! Keep in mind that it ran perfectly when the outside air temperature was below 50f. I don't see this would not be a charcteristic of plugs, wires, cap/rotor etc. On monday I did 65mph for an hour and a half and it only started near the end of my trip when the outside temp rose to about 51 (I have an outside temp readout on my electronic compass) When it starts its thing is perfectly predictable looking at the temp guage as long as it is over 50f.

Later this morning I will be getting the intake air and coolant sensors. I will let you know what develops. By the way I realy appreciate you input! (that goes for everbody) Looking at you website I see we are the same age!

If you have a multimeter check the resistance of your plug wires. I've experienced Accell Super Stock wires with a resistance as high as 10K. It appears those wires have a tendancy to break down after a short period of time and heat increases the problem.