I've noticed around 3000 rpm I'd get a little hesitation/stuttering.....very very light/small....but you could tell it was there.
I took out the PP today, and drove around......didn't notice the stutter any more. Granted, I'd like to drive it some more, but I'm pretty sure I'm not going crazy, and do feel a difference.
The real test would be to take it on the dyno again, and see what sort of number I put down, as well as see what sort of a/f ratios I'm putting out. I may try and do that.
I do think the PP has some issues.....whether it's ground related, I don't know....maybe it's just ultra-sensitive.
Another thing I did what take readings of the reference voltages at the connectors for the MAF sensor & TPS sensor.
With the PP connected I got:
MAF: 5.01-5.02 V
TPS: 5.12 V
Without the PP connected I got
MAF: 5.02 V
TPS: 5.13 V
The PP seems to be zapping some juice...it's like the inputs don't have a high enough resistance. I don't know.
Just something I noticed. I haven't really tested anything else. I just got back from a brewery tour/sampling
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