Just firing on one coil but replaced it and still not working

No fire to plugs. Replace the coil? Been a long time since I worked on these. I believe that they are set up like lawn mowers. They have a magneto to fire the coil. They can get rusty and not let the coil fire. Just something to check.

You checked the cap and rotor ?
And the coil wire is sparking on metal ?

Crank sensor if it has one,timing belt skipped is a possibility,and always the dread security key problem.don-ohio

replace the ignition module or pickup coil located under the distributor cap ignition modules work when cold and will stop firing when they are warm when they r going bad

Check for 12v at red wire, if ok then replace ign pick up module ( usually green and yellow wires under rotor). or pick up coil. hope this helps !!

Need to replace the coil pack. If there is a problem with the ignition module, then other coil pack would not work.

If coil is good and plugs are not - there's your problem. You can't have output of coil be good and plugs not work right. Something inbetween is wrong.

Grab a Spark tester from a parts store if you believe it is not firing, and locate the coil packs. Plug the tester on to the coil pack, and in to the corresponding plug wire when you turn it over you will see spark if it's working. If a coil is not working, switch it with another coil and see if the good coil has spark in the same position as the one that appeared bad. If the good coil also does not fire from that position, thecontrol module is bad. The control module is the plate that the coil packs sit on it is quite easy to replace by removing the coils, however not the cheapest part, hopefully it is the coil for your sake.

Is there spark coming out of coil? Check for injector pulse also check ASD relay. If all these are ok it may be worth while to check the crankshaft position senser and the pick up coil.

check the signal voltage going to afected coil harness, should be geting 12v. if its 0, the you may have a broken wire or pin on jack for that coil assembly