Plug Chop Question

[Guest]

Quick clarification question on the plug chop procedure.

After the first test, how do you properly clean the plugs so you can perform the next test and subsequent test without tainted results. Should you have new plugs for each test? Use emery or wire brush prior to each test?

Just a small detail question.
Thanks

[Agemax]

a small brass bristle brush will do the job, nothing too rough!

[ThrottleBack]

For cleaning spark plugs I have always done them the same way:

1 - spray with brake cleaner
2 - wait 30 seconds then wipe clean with shop towel, rag, etc
3 - grab brush or turn on bench grinder with wire wheel
4 - check gap if needed

[tkent02]

Just ride it. The plug will change color soon enough. Under high power it will change almost immediately. This is why you need to chop the engine, so it doesn't immediately change to show the conditions as you are slowing down and stopping.