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Discussion Starter · #1 ·
I understand that the VTEC changeover point will result in a few black puffs of smoke that expell through the tailpipe but I learned today that when I freerev my engine when the car is stopped to like 5000rpms or so I also get a few black puffs, I expect this is fuel? Is this normal? I was thinking maybe the secondaries opening @ 4700rpms throwing in more fuel and air was causing it cause I thought vtec couldn't activate unless the VSS read the vehicle was moving at x amount of speed before it would go ahead and activate, hopefully this is normal behavior
 
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