new leads, still not firing on all for

[DomP182]

Tried replacing what I thought was dodgy leads (kindly supplied by Adam) but it is still not firing on one cylinder. Could the coil be faulty or would that just not fire at all?

 

[DomP182]

Damn predictive, all FOUR!

 

[bil_liser]

depending on the ecu/coil setup typically DIS ignition will ignite 2x2 (i think the 2&3 then 1&4 depending on the engine) So if it was a coil pack fault, or wiring loom to the coil pack, or the ecu damaged by a bad coilpack or loom.. it would miss on 2 cylinders, not 1.

 

[DomP182]

hmm.. How can I check which cylinder its not firing on? Do I need to run it with the inlet manifold off so I can get to the plugs?

 

[Matt W]

Disconnect the plugs one by one with the car running, if you disconnect one and it makes no difference then that's the dodgy plug/lead.

Are you using the recommended spark plugs?

 

[DomP182]

Yeah original ngks on 54k , can't decide whether to order a new coil and plugs and hope?

 

[DomP182]

Right done that and i'm getting a spark on all four leads at the coil end and one hell of a belt myself ha ha! So they can only leave plugs or injectors right? Wow i'm buzzing now

 

[DomP182]

Oh and it didn't appear to make any difference to the firing

 

[DomP182]

I'm going to try unplugging injectors one at a time

 

[Budgie]

I'm going to try unplugging injectors one at a time

That's the best way to eliminate which isn't firing.

 

[DomP182]

Ok so its cylinder three that's not firing ie no change when injector unplugged so am I right in thinking its either a spark plug or injector fault? Swap a plug over then I suppose

 

[Budgie]

Ok so its cylinder three that's not firing ie no change when injector unplugged so am I right in thinking its either a spark plug or injector fault? Swap a plug over then I suppose

Yep, spot on.

My bet is on the injector.

 

[DomP182]

I hope its one or the other and not worse, cheers mate

 

[DomP182]

Ha I've fixed it, Budgie you were right.