Coil packs and firing order

[julian64]

Can't really get my head round this and really need someone to lead me up the garden path.

Does anyone have a circuit diagram of the coil packs or what car they're from so I can try and get a circuit diagram?

Trying to explain to someone the firing order taking into account the flat plane crank got me terribly confused, cos I can't make it work in my head.

[BLUETHUNDER]

I They are from a Citreon ZX.They are listed in the alternative parts list and avaliable from euro car parts.

[HarryW]

Try getting german made ones (bosche?) as I had to change mine inside 1000 miles, apparently they last longer in the heat.

[HarryW]

As to the original question coil pack/HT lead wiring was raised recently here http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[julian64]

But which pairs are connected together in the coil packs and therefore whats the actualy firing order of cylinders on the engine?

[HarryW]

Ah I see, I only know by banks on each bank the centre and outer two are connected together in wasted spark. So for the near side 1&4 2&3 are connected at the ECU end (single driver) and fire together. This is a useful snippet for diagnosing a duff pack/lead or ECU amp.
If you are looking for what the actual firing order is I'm not sure.

Editted to add when I say 1&4 2&3 I mean if it were a single 4 cylinder engine so for the V8 that would be 1&7 3&5

Edited by HarryW on Friday 7th September 22:51