Still chasing rough idle.

[Crash Lander]

Well, new leads, new NGK plugs didn't fix it. Even cleaned out the throttle body as described in another thread. Really didn't make much difference, if any at all. Got quite a bit of black crap out of it though.

I haven't changed the battery yet, as suggested by someone here, but the old one seems fine now. (Was dead flat when I bought the car). I charged it over night one night and it's been fine ever since.

The old spark plugs looked like they'd been in for quite a while, but they were a nice colour and not gunked up when I pulled them out.

It shouldn't be the col packs, because when my mechanic fitted the leads for me the other day (Didn't have time myself, so just got him to do it whilst I was at work. His workshop is right across the road from work.), he said that the coil pack didn't look that old, and suggested it had already been replaced fairly recently.

It's had a new (reconditioned?) alternator in the last 18 months according to the sticker on the alternator.

What should I try next? May be run a bottle of injector cleaner through it? Or is that stuff just snake oil?

It's not a BIG problem, it's just that it's not quite exactly as it should be! You know what I mean?

[howesy]

It still could be a power thing or even a bad earth. Check the earth to block and clean it and also go through your connecters and unplug and replug them in case of oxidisation and also take off passenger kick panel and check that the ECu earth is grounded properly its only a skinny sucker but can cause problems. When you have exhausted all this and your happy all is well use a battery out of some one elses car that is running well as sometimes a battery can seem ok but still cause grief.
Sorry buddy but it's a process of elimination once you have done what you have already, otherwise get it hooked up and the codes should tell whats going on, even a regular mechanic with an oscilloscope (one who can read them properly) should be able to nail it down for you.

[Mechan1k]

I am trying to chase a miss with an LPG ute ... and I am tending towards a coilpack at the moment ... you could have a faulty coilpack ... I guess you could try and test it on a dyno and see where the voltage is dropping.

some oscilloscopes can't read coilpack vehicles ... although there is a Snap-on handheld scope that can .. I guess you can try it with that.