86 chvy 305 mtr c-10 died while driveing cant get any fire

my truck did that while i was driving on freeway then would backfire i had changed spark plugs and wires and when i did that it made my ignition coil stop working but i just cleaned it off when i dies while driving just throw it in neutral and restart it so you dont have to come to a stop

Check the timing

Visual inspection to confirm dist rotor is turning. Check pick up coil under rotor, 2 small wires, green and white tend to break, pull on them slightly to check. The rotor can burn thru and short to ground. try these.

cam/crankshaft sensor? plug wires, coil? Has to be coil, wire, plug, ignition module, distributer / cap/ rotory button inside cap. You can find faulty coils bought new. New autoparts can be shipped from factory with defect.

I guess you could have the ignition analyzed on an oscilloscope. Maybe a tech could see something then.
I always heard the only gap was the spark plug gap-the rotor has no gap-are you sure you got the correct rotor? And does it touch the top distributor cap coil wire tower?

Let us know. It is a mystery worthy of a solution.

I had to replace the magnetic pick-up sensor on the side of the distributor that tells the coil when to fire on my 86 truck. It was $80 and slips onto the distributor held on by the cap.

What size engine?

Remove the plugs from the head. Insert into the coil wires. Make sure they are properly earthed on the engine. Crank the motor and check for spark at each of the plugs.
Refer to the diagram. Cylinders are connected as shown on the diagram in blue. 1 goes to cylinder 1(sparkplug furthest from coil pack), 2 to 2, 3 to 3 and 4 to 4(closets to coil pack).
To test the coil pack use a digital volt meter. Measure resistance between coil towers for coil 1(marked 1 in red on diagram) Value should be between 12000 and 14500 ohm. Do the same for coil towers 2.
Measure resistance between I and C1. If the measurement is more than 5 ohm the coil is defective. Do the same for I to C2.
Measuring voltage at I(Ignition start/run) to ground should be 10V.
I is connected to the 15A engine fuse. The radio interference capacitor is connected between this line and earth at the coil. Disconnect it to see if it cures the problem.
C1 and C2 connect to the powertrain control module.
Bear in mind that aftermarket coil wires may cause problems with misfiring, so see if you cant find an OEM coil wire to replace the broken one before replacing anything else.

Ignition module... Most auto parts stores can test these

Did you grease the back of the ignition module? if not do so.