Faulty ignition coil?

[CraigOz]

Hi everyone,

I have a misfire, or more to the point, non fire on cyl 4.

I checked the resistance on primary and secondary, primary is 2.2ohm (spec is 2-4ohm) and across the leads was 11.49 Kohm (spec 25-40 Kohms)

Before I race out and drop $220 on a new one, does anyone not concur with my thoughts that it's not serviceable?

2004 model

Thanks
Craig

[GSXKING]

@Hooli   

[gsxbarmy]

Are you sure it's an electrical issue? Could it be a dirty injector?

[seth]

You could try swapping Injectors 1-4 it's fairly straightforward to do and they are the 2 easiest to get to and see if the problem moves .
Check all the obvious things first like vacuum hoses to the throttle bodies before spending lots chasing an unknown fault .
Do all the easy checks first.
 

[grog]

As i always say, basic tests first, have you actually tested spark or just guessing? Its your 1st step.

[Hooli]

Yeah I'd test the spark first. They are dual coils so if the coil had failed then you'd lose two cylinders, pretty sure it's 1 & 4 on one coil, 2 & 3 on the other.

You can change the leads apparently if you pull them out hard enough to break the seal. The other end of the lead had rot & not connect to the plug cap, try cutting 5mm off it & screwing the plug cap back in.

Faulty plug? have you swapped them about to see if the fault follows a plug? You could do the same & swap the leads on 1 & 4 to see the fault follows that too. I think the plug caps can fail, that'd follow the lead as well.

As for buying new coils, what are you looking at for $220? as far as I know Suzuki haven't had any coils for these to sell for donkey's years. I'm sure others fit, a coil is hardly a unique thing to a 14 though.