NGK colder plugs, smoother idle???
#1
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NGK colder plugs, smoother idle???
I am running a 2.3L stroker with all the boltons including a FP Red. My car was running great except for a very rough idle, even after a tune. I just changed to a 1 step colder racing NGK sparkplugs and the motor is now much more smoother. Could it be the sparkplugs??? The original ones had only 17k miles on them. Also, the new NGKs are about a quarter on an inch longer than factory ones, is this ok?
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#4
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Another thing that could help your idle, unless you already have it, would be a good coil on plug pack. The new plugs with the higher discharge spark current should help you out, they did great for me. The plug gap could have effected the rough idle, how did the plugs look when you pulled them? A lot of soot on the end?
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In general, a colder plug will tend to foul easier than a hotter heat range plug given the same driving conditions. I don't do much stop and go driving but I change my plugs every 2,500 miles(4,000 Kms.), or every other oil change, as Turbodoug mentioned.
Last edited by sparky; Nov 1, 2009 at 07:32 AM.
#7
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Another thing that could help your idle, unless you already have it, would be a good coil on plug pack. The new plugs with the higher discharge spark current should help you out, they did great for me. The plug gap could have effected the rough idle, how did the plugs look when you pulled them? A lot of soot on the end?
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