One of my spark plugs looked like this when I took it out as part of it's 6 monthly check up...
The plugs are standard ngk type on a Silvertop and Webers with only around 2k miles on them. The rest of the plugs look fine and the engine runs OK
though a bit lumpy when cold. The carbs are balanced, the leads were replaced at the same time as the plugs. When running the exhaust does not smell
over rich..
What could be causing this? Could it be a faulty lead or plug? This plug is also considerably blacker than the others but is not oily.. looked on the
internet and not seen anything like this before
Alex
https://photos.app.goo.gl/eiAODq0B2aD7JrB43
[Edited on 19/2/18 by AlexXtreme]
Maybe it's just the picture but I can't see corrosion there, just soot. Looks like it's running rich on that cylinder.
Just realised what it could be.... one of the plugs developed a fault and I brought a replacement. It must have been a different ngk version of plug
(platinum tip looking at their web site) with out realising it!
Panic over..
quote:
Originally posted by adithorp
Maybe it's just the picture but I can't see corrosion there, just soot. Looks like it's running rich on that cylinder.
Normal by design
https://www.amazon.co.uk/Denso-Platinum-Twin-Spark-Plug/dp/B002M2INCG
I’ve just bined all 4 brand new NGK platinum plugs cause they are all fried. less than 200m of driving and 1hr running.
quote:
Originally posted by AlexXtreme
One of my spark plugs looked like this when I took it out as part of it's 6 monthly check up...
The plugs are standard ngk type on a Silvertop and Webers with only around 2k miles on them. The rest of the plugs look fine and the engine runs OK though a bit lumpy when cold. The carbs are balanced, the leads were replaced at the same time as the plugs. When running the exhaust does not smell over rich..
What could be causing this? Could it be a faulty lead or plug? This plug is also considerably blacker than the others but is not oily.. looked on the internet and not seen anything like this before
Alex
https://photos.app.goo.gl/eiAODq0B2aD7JrB43
[Edited on 19/2/18 by AlexXtreme]
quote:
Originally posted by furryeggs
I’ve just bined all 4 brand new NGK platinum plugs cause they are all fried. less than 200m of driving and 1hr running.
That is way to much soot on the plug [rich mixture]. It time to dis-assemble that carb. Check the float seat and level plus the air bleed jet condition. Give the carb a good cleaning and you will be back in business. Davew823
quote:
Originally posted by coyoteboy
quote:
Originally posted by furryeggs
I’ve just bined all 4 brand new NGK platinum plugs cause they are all fried. less than 200m of driving and 1hr running.
Sounds like you may have setup issues then, because I ran NGK plats for 45K miles without a problem on a megasquirted turbo and the stock ones were the same before that at 100K miles. How were they fried?
quote:
Originally posted by furryeggs
I’ve just bined all 4 brand new NGK platinum plugs cause they are all fried. less than 200m of driving and 1hr running.
thanks for the comments..
- pretty certain that the other spark plugs were not fake as they were brought from a local motor factor - did not realise there were fakes around and
thanks for the info
- the different plug was brought from Halfords in a hurry when one of the plugs failed all the other plugs have been fine and look right
- I was going a clean / service of the carb at the time as part of a service so hopefully should have sorted out the blackened plug. The car
definitely ran smoother and just need some dry weather a bit above freezing to test it!
- good point on the gap. The original gaps were check but did not check the new one.