there are four coils on rear valve cover each one runs 2 cylinders. auto parts stores can tell you the firing order, im not sure
here is a diagram
try changing your coil as well as your secondary coil make sure there is gas and spark drive safe
located in the distributor itself, follow wires coming from coil to distributor
It is important to have wiring diagrams on hand. A person can get an ignition coil wiring diagram for a 1987 Dodge Ram 50 in the maintenance manual.
are the wires good? Plugs?
Hayes Repair Manual, $20 tops.
here is a diagram
COIL
im not sure but if you follow the spark plug wires they will take you to the coil packs
where are the coil wires located, and where do they hook up
remove the upper intake then lower. might change plugs and wires as well
Heater coil
It may not have plug wires, check the top of the motor for a coil block.MORE: trust me, it has plug wires. They just pull straight off. You'll probably have to follow the wires around to the backside of the engine to find where they plug into the coil pack.
Follow any of the spark plug wires from the spark plug to the top of the engine and they all will meet at the coil pack
Fuel injectors or coil
start with checking the coil packs wires sparkplugs
They go to the computer. swap the coils out and see if the problem goes with it, if so the coil is bad. If not you need to look at the ignition module.