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[ffcgary1]

As the saying goes, a fool and his money are soon parted.... come on mate... you dont have time to go into a vx dealer and buy 6 plugs for christs sake.
Time AND time again the advice given on here to members is stick with the gen parts but still people ignor to there cost, AND cost in this case is a poor performing engine, since you fitted these plugs. Put the original plugs back in and see if the pinking dissapears.

[JamesV6CDX]

I'd want them made out of gold, that's more than £10 a plug! You can get genuine GM ones either mail order on Ebay or even via AndyC, so there's no excuse for not buying genuine 

On a serious note mate - if this issue has started since the introduction of these plugs, and was fine before, then it's quite a co-incidence if it's not related. I've heard good things about Denso plugs, in fairness to them, and they SHOULD be absolutely fine - BUT they are still an unknown quantity in this equation. I would say you need to try it with genuine GM plugs and take it from there. They just might, have some sort of incompatibility.

I think I speak for everyone who has contributed to this thread so far, in saying the advice given is to put genuine GM plugs back in there and road test.

At the end of the day GM plugs are a couple of quid each, so even if it turns out you didn't need them, you'll have them in the glovebox/boot when the next service is due. Or handy spares.

What you describe as a "pinking" I think you're actually trying to explain the symptoms of a HT misfire - which, by very nature, will be much more apparant under engine load - and not log any fault codes in the ECU, as it's a non DBW engine. Therefore it would also be very wise to individually check each HT lead, ensure they they are not split/cracked/damaged, are fully home, so on so forth. Pay specific attention to the shaft of each lead that goes into the plug hole.

Also, without wanting to sound like I'm teaching anyone to suck eggs, were the plugs properly tightened? If not they can work loose very quickly...

[TheBoy]

were the plugs properly tightened?

And that means a torque wrench used....

[symes]

Told Waynester he need breathers looking at and could do with some new leads this was when Plugs were done 

[TheBoy]

Told Waynester he need breathers looking at and could do with some new leads this was when Plugs were done 

So leads are probably a culprit - the act of removing to change plugs may have been final straw.

[symes]

Told Waynester he need breathers looking at and could do with some new leads this was when Plugs were done 

So leads are probably a culprit - the act of removing to change plugs may have been final straw.

yes mate but you try getting some at 3.30 on a sunday afternoon
will give him a call as his band not got concert next weekend

[The Waynester]

going to see Symes on Sunday in Cowley (Oxford)  fitting new HT leads, fuel filter, doing the breathers, changin air filter while i`m there

what does VX charge for HT leads, fuel filter and an air filter for the lot?

thanks 

[TheBoy]

I'd recommend air filter defo from GM (pattern are sub standard). Fuel filter, GM on cost if you have tradeclub. Try AndyC if you don't/

HT leads, GM are ridiculously expensive, so pattern.

[The Waynester]

already got a set of Bosch silicone HT leads anyway, will use genuine VX fuel filter, already have K&N Air filter in my car, it may still be okay anyway
has given me ZERO probs

[TheBoy]

Is it the K&N type that is supposed to be oiled regularly?

Either way, when you replace, the GM one is the best.

[symes]

Is it the K&N type that is supposed to be oiled regularly?

Either way, when you replace, the GM one is the best.

yep  but Wayne usually asks me what brand and I tell him same as 99% on here only some are different-mainly what I use and mine IS Highest mileage mig on OOF-no doubt

[The Waynester]

Okay mate, i have a Pipercross air filter that i bought last year, haven't fitted it yet
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=120957108962

but will buy a VX one as well

what do they cost?

[dbug]

Is it the K&N type that is supposed to be oiled regularly?

Either way, when you replace, the GM one is the best.

yep  but Wayne usually asks me what brand and I tell him same as 99% on here only some are different-mainly what I use and mine IS Highest mileage mig on OOF-no doubt

Oh no it isn't mate - Zirk in excess of 255K - so lets kill your claim once and for all 

[symes]

Is it the K&N type that is supposed to be oiled regularly?

Either way, when you replace, the GM one is the best.

yep  but Wayne usually asks me what brand and I tell him same as 99% on here only some are different-mainly what I use and mine IS Highest mileage mig on OOF-no doubt

Oh no it isn't mate - Zirk in excess of 250K - so lets kill your claim once and for all 

is it older than 2000?

[dbug]

Is it the K&N type that is supposed to be oiled regularly?

Either way, when you replace, the GM one is the best.

yep  but Wayne usually asks me what brand and I tell him same as 99% on here only some are different-mainly what I use and mine IS Highest mileage mig on OOF-no doubt

Oh no it isn't mate - Zirk in excess of 250K - so lets kill your claim once and for all 

is it older than 2000?

Whats the year got to do with it mate - your many claims on OOF only mention mileage!!