i first would check to see if the coil, is lose, then make sure u have it away from the manifolds, heat kills the coils fast. make sure ur plug wires are in the looms and not arking. and make sure the polaritys are correct on ur coil.
I'll include a link to a video below that will show you how to repair the ignition coil in your Ford F250 or F350. hope this helps.
What is there stance specifications on an ignition coil for a ford 5.8 f250
disconect the coil and remove the 7mm bolt that holds down the coil, remove the coil then plug.
Is it the module or the coil paxk they are replacing? If it's the module replace the coil pack.....Or try the GM one and not an aftermarket....Or just a different brand of AM
THE COIL ON A 1977 CHEVY TRUCKIS IN THE DISTRIBUTOR CAP. TAKE THE PLUG WIRES AND HOLD DOWN RING OFFOF THE CAP TO EXPOSE THE COIL. WEDGEMAN
I would look first to the rotor, and then maybe at the module check the ignition module
Bad Plug or coil pack.
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front
are under the coil that is held down by the 7mm bolt. the round black things.
They are separate The ignition module is on the drivers side fender usually mounted in the middle of an aluminum box with fins on it. The coil is easy to find just follow the center wire on the distributor and you'll find it.
Dust module
Next time you replace the coil, test and if necessary replace the resistor.