I can't recall, but Gareth has one and showed me years ago but I forgot what they look like. Have you done a compression test? I know that having a little different comp between the cylinders does make idle a little like it's uneven or like a slight miss but sounds normally once you bring the revs ...

What do they look like guys?

Don't know if I've ever seen them.

Thanks, I'm thinking that I'll wait to smoke test it, then if the gaskets still leaking, I'll do the gaskets. The ones currently fitted were good ones from Mace Engineering. If this is the first time they come loose in near 100,000km, then not too bad. But I will, have, taken your suggestion and wil...

Hi Guys, sorry it’s been a while without any updates. Life issues got in my way. Anyway, here is an update of events and findings to get back up to date. I managed to return the O2 sensors which were not quite responding as they should have. I then got genuine (yes confirmed genuine) Bosch O2 sensor...

You can turn off the knock sensor in the earlier ECU's with ESC parrams but I don't know on your model. Ok, it looks like my Pcm in tunerpro has the ability to turn of the Knock sensor learn mode. Also deselect what cylinders it can apply to. So I might try that first and see if the logs show them ...

Ok, I have just taken a look in TunerPro, at the knock sensor settings area. Any thoughts on this guys. I see that the Cyl # knock sensor select areas have only the 2, 4 & 6 cylinders selected. Is this correct for the V6 ecotec engine ? It seems a bit strange. I would have thought that either AL...

Ok, that makes sense about the limp mode. Though the knock tripping in the logs has shown retard degrees upwards at times of 28deg I've seen. The knock reports in the logs seems to be mainly on acceleration. But unlike the old days when you could hear or even feel a knock. I can't feel anything or h...

It'll tell you that the circuit was working ok and then with a knock sesor out logging code will then tell you the limp home works. Then just reconnect it and erase the code and moove on with the diagnosis. That figue of the injectros delivering 50% more seems impossible it would run. 50% is a mass...

when it runs rich for so long it'l kill the o2's quick. Thanks, Yeah, I have a feeling that it all comes back to a set o injectors at the cause of this whole saga of events. I am hoping that once I can confirm the knock sensors aren't actually an issue with possibly causing phantom retardation of t...

The carbon that builds up on a piston is caused by burning oil not a rich mixture. Also look over the engine for anthing loose like an alternator that coulld produce a knock like noise. To check the knock circuit disconnect the knock sensor and go for a drive and it should then log a code. Thanks C...