Changin coil packs

Hi all. I have a 2002 Jimny and it misfires. I also haven’t got a clue what I’m doing so this forum and YouTube are absolute essentials for me.
I’m following the problems, and I now want to change the coil packs. Basically, I want to change the coils and the leads (the wiring loom that plugs on to them). the lot. I just can’t find out what I actually need to bloody buy and it’s a minefield for the incompetent amateur. Can anyone spell it out to me - I want to change the 4 could that plug in to the spark plugs and the wiring that plugs in to the coils. 
Thanks everyone 

I don’t mean to discourage you from doing your own repairs but a lot of things can cause a misfire, coil packs are only one of them. For example spark plugs, fuel, filters and a host of sensors can all cause a misfire.

It could get quite expensive replacing parts (E.g. coil packs) without knowing if these really are the cause of the misfire.

Before you commit to firing parts at the car I suggest going to see your local small garage, they would be able to put a code reader on the car and find out what fault codes are pending, this would then inform you what is needed. You would then have the option of getting the garage to do the work or perhaps do it yourself.

If you decide you want to do it yourself code readers aren’t expensive, although you will need to check which interface you car has, probably OBD II, but it might depend on which model you have and which country you are in.

If going the diy route it would be helpful to know what you have done so far and if you get a code reader what faults are pending.

Good luck

I got someone to have a look with a diagnostic kit and there were no fault codes. Basically the engine ticks over at high revs and hunts while it’s ticking over. Also stalls once it’s been running for a while. I’ve not done much with it but have changed the spark plugs and the crank case position sensor. Will get someone to have another go to see if there are any more fault codes showing once I’ve fiddled with the coil pack. 

*crankshaft position sensor

Doesn't sound like a coils / plug wires problem to me, but no harm in getting new parts there.  HT ignition components don't last forever, and if they have 20+ years' service on your Jimny that's good enough.

@DrRobin is correct that diagnosis-by-parts-replacement can get expensive.  But on the other hand, it is a great way to learn what the individual parts are and what they do.  And if your car has a lot of deferred maintenance, you would be replacing a lot of these bits anyway IMO.

I think (based on your very brief description) that your problem is not ignition-related.  But again, as long as you've got the "parts fund" ready, you will get there in the end.  Just keep approaching things in a methodical way, and don't get frustrated if the car isn't completely fixed after the first or second or third thing you try.  

Hopefully one of our Gen3 experts will answer your question about sourcing the coils.  I would think they are not hard to find.

I don't often visit this forum these days, but have popped in. So I may not respond to any further questions you may have.

It sound not like a misfire but like the engine is hunting. I would suggest it has nothing to do with your ignition system but more likely that you have a vacuum pipe leak or an air leak after the MAF sensor, so there's un-metered air going into the engine.

Have a look at the little vacuum pipes off the inlet manifold to make sure they're all connected and not split. Then check the rubber inlet pipe from the air filter housing to the throttle body checking for a split.

Kirkynut