Hi all. My question is when I am in the upper rev range an on full boost my external gate tends to make a fluttering sound similar to rev limiter but I am not on the rev limiter. Have 2 ideas but would like some help in tracking down the issue. First is that the plugs or leads may be failing causing a miss. The other is the motor may be pinging and that's what I am hearing. Any assistance will be greatly appreciated.