Monaro 6.0 VXR running rough

[shunter V8]

Hi I have been having a problem with the ro at first it seemed when it was cold it was running very erratically when you put your foot on the gas it was spluttering until the revs picked up then it was fine, once warmed up all seemed good. Today it did the same but I have noticed if you are in a higher gear (even 2nd) and below 2k rpm when you accelerate it stammers and splutters until you get above 2k then it's fine. I was advised to run the tank almost dry of fuel as the car does not do a big mileage so it could be spent fuel but I have done this with no joy. Any suggestions would be greatly appreciated.

Edited by shunter V8 on Sunday 10th April 21:44

[shunter V8]

Thanks for your help and yes it does idle a bit rough compared with what it did as it was silky smooth, that's good advice on the ignition system I didn't know that so it could be that is the culprit. I am on the Isle of man so unfortunately not near you but I really appreciate the offer.

[shunter V8]

That's fantastic thanks for your kind offer, I will check grounds and change plugs first and take it from there. I will let you know how I get on.

[shunter V8]

Can anyone confirm the proper plug for this engine i have found NGK IZTR5B11 under VXR8 with the LS2 fitted, i would presume the Ro would use the same plug. Sturdy you are spot on with Rock Auto less than half the price i could get that plug in the UK. Thanks.

[shunter V8]

Oh yes that's more like it not that i am saying i am tight of course. I will get some of them ordered up, its no big deal even if that's not the fault at that price. Many thanks for your help Sturdy.

[shunter V8]

I totally agree with you Sturdy my car has only done 35k miles from new and has had the plugs changed at least once in the twelve years I have had it, I managed to borrow a tool today called a spark view that clamps on to the HT lead and gives a reading all cylinders were a similar reading a steady 10kv rising to just below 15kv so I presume that is saying the coil packs are ok I am not so sure its checking the plugs I will ask the chap I borrowed it off. No faults have come up on the dash so even though there is a diagnostic socket would I be correct in saying that nothing would be recorded or do they not work that way.

[shunter V8]

That's great to know I will investigate further when the weather improves it's awful here. Yes all good on the island thanks looking forward to TT.

[shunter V8]

Thanks and that's a very good point as I know they have not been changed in twelve years and very much doubt they were done before that.

[shunter V8]

That's funny I was just talking about you yesterday as someone said that mine was the only HSV on the island, Union Mills is perfect for me, is he down in Corletts yard., please send his number on to me in case I need it, I wanted to check a few things today but have landed an absolute stinker of a cold.

[shunter V8]

Hi Paul, we hope you are doing ok and look forward to seeing you next visit, thanks for that bit of advice I can get a hold of one of these thermometers as I did use one on an old CB750K2 I was working on, they are a useful piece of kit. There are a few UK bikes over for Easter by the looks of it, hopefully I can shake this cold and get out ourselves.

[shunter V8]

The black CV8 was Andy's he moved back to the UK and the R8 is Iains he moved house but is still on the island and still has the R8, so to my knowledge there are three over here including yours. Thanks for passing on the number much appreciated. Dont worry about the spelling of my name I am well used to it as most people think its spelt the other way.

[shunter V8]

Just to give an update on this one, thankfully it was solved by fitting new HT leads and it's running lovely again. Thanks for everyone's input and thanks Andy Jock is a good guy to know.

[shunter V8]

I totally agree it was great news it was a simple fix but nothing more annoying than finding a thread with symptoms very similar to yours to find no final closure. Thanks again everyone.