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Old 10-28-2007, 11:55 AM
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spark plug reading?

to inspect the plugs after running the engine, should i run the engine to operating temp. and then rev it to high rpm and shut it off at the high rpm moment? or is that bad for for the motor?

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Old 10-28-2007, 12:36 PM
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You have to run the engine under full load to get the best reading. A 1/4 mile run or a lap around the track, etc. Shut off the engine immediately after you lift then coast to a stop and read the plugs. You'll have to adjust your routine depending on the type of track and local rules.
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Old 10-29-2007, 08:26 AM
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Quote:
Originally Posted by ernkazern
You have to run the engine under full load to get the best reading. A 1/4 mile run or a lap around the track, etc. Shut off the engine immediately after you lift then coast to a stop and read the plugs. You'll have to adjust your routine depending on the type of track and local rules.
I just want to add that as you shut the engine off you must also put the trans in NEUTRAL as you want no load on the engine. The engine should not continue to turn over once the ignition has been shut off.

Another note is that with the advent of unleaded gas it is more difficult to "read" your plugs.
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