Spark Plugs
Elite HDF Member
Joined: Jul 2008
Posts: 4,741
Likes: 45
From: Indian Land, SC
Just changed mine out at 10,000+.
Front plug looked like it was running rich (dark black), rear plug was light gray.
Running V & H Fuel Pak....
Suggestions/Comments... (other then ditching the Fuel Pak)
Front plug looked like it was running rich (dark black), rear plug was light gray.
Running V & H Fuel Pak....
Suggestions/Comments... (other then ditching the Fuel Pak)
. NGK irradim 23. Bucks for two cheap ins.
Ultimate HDF Member
Joined: May 2008
Posts: 7,439
Likes: 884
From: 'Noke, VA
Stock plugs at no more than 10,000 miles. I was chasing a ping in my tune for the better part of two weeks. Plugs looked fine and were properly gapped. I changed plugs and the ping vanished. Anything other than the stock plug is going to goof with the ion knock sensing.
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