Spark plugs - Nickel vs Platinum vs Iridium
Discussion
Interested in others opinions on how these longer lasting plugs perform particularly in respect to possibly causing slight misfires?
I think I seem to have established thar Iriidum can cause misfires in various engines, whitch is my experience, and only work well in a narrow range of engines. However don't know wheather Platinum have a propensity to also do the same. Then what about Nickel, particularly thinking about ther Denso TT range.
I think I seem to have established thar Iriidum can cause misfires in various engines, whitch is my experience, and only work well in a narrow range of engines. However don't know wheather Platinum have a propensity to also do the same. Then what about Nickel, particularly thinking about ther Denso TT range.
NickCLotus said:
Interested in others opinions on how these longer lasting plugs perform particularly in respect to possibly causing slight misfires?
I think I seem to have established thar Iriidum can cause misfires in various engines, whitch is my experience, and only work well in a narrow range of engines. However don't know wheather Platinum have a propensity to also do the same. Then what about Nickel, particularly thinking about ther Denso TT range.
Would be curious to learn more about how this was established, and what engines they allegedly do / don't work in. Not something I've heard of. Do the iridium plugs come gapped to the correct spec...?I think I seem to have established thar Iriidum can cause misfires in various engines, whitch is my experience, and only work well in a narrow range of engines. However don't know wheather Platinum have a propensity to also do the same. Then what about Nickel, particularly thinking about ther Denso TT range.
Unless the spark plugs are particularly awkward to get to (Subaru boxer engine for example), I've personally just used copper plugs, buy a load at a time (last time bought 24 NGK plugs for £56 delivered) and replace them every 2 - 3 years
NickCLotus said:
Interested in others opinions on how these longer lasting plugs perform particularly in respect to possibly causing slight misfires?
I think I seem to have established thar Iriidum can cause misfires in various engines, whitch is my experience, and only work well in a narrow range of engines. However don't know wheather Platinum have a propensity to also do the same. Then what about Nickel, particularly thinking about ther Denso TT range.
Nope, never had such issues.I think I seem to have established thar Iriidum can cause misfires in various engines, whitch is my experience, and only work well in a narrow range of engines. However don't know wheather Platinum have a propensity to also do the same. Then what about Nickel, particularly thinking about ther Denso TT range.
pretty much all modern cars have precious metal plugs due to their longer life and better overall performance.
Exactly what engine ?
NickCLotus said:
Engine is Peugeot JP5TU4 (NFU).
Iridium plugs caused slight misfire at idle and misfire at low throttle openings under load. Swapped them out and those problems went away. However now have slight misfire on partial overrun when hot, thinking it could be plug related again.
It would seem you have another problem if the plugs are installed correctly.Iridium plugs caused slight misfire at idle and misfire at low throttle openings under load. Swapped them out and those problems went away. However now have slight misfire on partial overrun when hot, thinking it could be plug related again.
And on the overrun, cars do a complete fuel shutdown, so you could not have a misfire, because there is nothing to fire.
Has this vehicle ever ran correctly ?
stevieturbo said:
It would seem you have another problem if the plugs are installed correctly.
And on the overrun, cars do a complete fuel shutdown, so you could not have a misfire, because there is nothing to fire.
Has this vehicle ever ran correctly ?
Well I believe it did when it had the original old plugs in it; these were Bosch FR8SC+ which is actually the wrong heat range for the engine which shouid be 7 by the manual,And on the overrun, cars do a complete fuel shutdown, so you could not have a misfire, because there is nothing to fire.
Has this vehicle ever ran correctly ?
Interesting that the misfires you're chasing all occurred under light load / no load conditions, when it's easiest to strike a spark. The exotic metal plugs also tend to use smaller electrodes which make it easier to strike a spark. If you're concluding that this is leading to a weaker spark then you've got an uphill job to prove that. Isn't it more likely that you're running the plugs too cold, or have a mixture or timing problem under those conditions?
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