I need some help with the spark plug firing order i got the order but i dont understand where the wires go which wire is first and so fourth if someone could draw me a diagram or something so i can understand it where the wires belong from the maniforld to the round thing ill be greatful. and also does anyone know how much it cost to repair a cracked manifold? my jeep idle is really rough when i come to a stop light or stop sign it vibrates too much engine is too lould. and someone told me it could be the manifold thats cracked.thanks alot
Normally to repair a cracked manifold its just as expensive to get a new one because manifolds are cast iron, you can get a new one from ebay for 30 bucks apposed to 100$ to have it welded with special matieral here is the firing order
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yah direct ignition coil pack does away for the need a a distributer cap and rotor.much higher energy ignition system where the computer tell when to fire.if that helps.not hard to change.as long as you change them one at a time so you don't screw up the order.
Firing order for the 4.0L 6-cylinder is as follows:
As for the spark plugs, it looks like the Autolite AL 985 plugs are what you need. If you are going to replace the plugs, might as well also replace the plug wires, the distributor cap and rotor (if you have those, I dont recall which year they went to the distributorless ignition).