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[Dazzler]

My spark plug ceramic sections are burning after only about 6-7k :-/
Surely this is not normal, is it???

[Lazydocker]

What plugs are you using? I had genuine GM ones in for 20k and they were fine. In fact, I'm going to replace the 2k old NGK (single electrode) ones with GM ones very soon as I only fitted them as a trial.

[feeutfo]

bloody hope not, havent checked mine since install.

[Dazzler]

What plugs are you using? I had genuine GM ones in for 20k and they were fine. In fact, I'm going to replace the 2k old NGK (single electrode) ones with GM ones very soon as I only fitted them as a trial.

Running GM twin electrode as recommended

[Ghost]

I have twin electrode NGK's in and have no probs
I dont have lpg though. :-/

[Kevin Wood]

My spark plug ceramic sections are burning after only about 6-7k :-/
Surely this is not normal, is it???

IIRC your car was running a bit lean until we tweaked it? Might be worth double checking that the vapour pressure is still OK and the O2 sensor output stays solid "rich" under full throttle?

No issues here with the quad electrodes.

Kevin

[Dazzler]

My spark plug ceramic sections are burning after only about 6-7k :-/
Surely this is not normal, is it???

IIRC your car was running a bit lean until we tweaked it? Might be worth double checking that the vapour pressure is still OK and the O2 sensor output stays solid "rich" under full throttle?

No issues here with the quad electrodes.

Kevin

Pressure is 1, so thats still fine, i have raised its cut in temp as it was coming in too early causing very rough idle with an occasional mis-fire.

[Kevin Wood]

My spark plug ceramic sections are burning after only about 6-7k :-/
Surely this is not normal, is it???

IIRC your car was running a bit lean until we tweaked it? Might be worth double checking that the vapour pressure is still OK and the O2 sensor output stays solid "rich" under full throttle?

No issues here with the quad electrodes.

Kevin

Pressure is 1, so thats still fine, i have raised its cut in temp as it was coming in too early causing very rough idle with an occasional mis-fire.

I had the same issue. I found that the temperature is not such an issue, it's switching over to gas too soon after engine start. Mine is now set to switch over at 20 deg.C and after 30 seconds running. It still falters a little after 30 seconds but normally I'm up the road by then and it runs quite happily under load.

An idling issue won't have cooked the plugs, though, so the problem is likely to be from running under heavy load IMHO.

Were all the plugs similarly affected?

Kevin

[Dazzler]

My spark plug ceramic sections are burning after only about 6-7k :-/
Surely this is not normal, is it???

IIRC your car was running a bit lean until we tweaked it? Might be worth double checking that the vapour pressure is still OK and the O2 sensor output stays solid "rich" under full throttle?

No issues here with the quad electrodes.

Kevin

Pressure is 1, so thats still fine, i have raised its cut in temp as it was coming in too early causing very rough idle with an occasional mis-fire.

I had the same issue. I found that the temperature is not such an issue, it's switching over to gas too soon after engine start. Mine is now set to switch over at 20 deg.C and after 30 seconds running. It still falters a little after 30 seconds but normally I'm up the road by then and it runs quite happily under load.

An idling issue won't have cooked the plugs, though, so the problem is likely to be from running under heavy load IMHO.

Were all the plugs similarly affected?

Kevin

Yes, all the plugs were similar :-/

[Richard A]

Due to problems with GM plugs I fitted 6 NGK 'Iridium' spark plugs.
That was 2nd May 2007 and 42,000 miles ago, maybe have a look soon !!

Regards
Richard A

[DaviesEB]

Had min changed today. With Gm plugs but made in Korea. From a dealer who brought made in Korea Opels.
Any opinions on this?