Need Help

[n2a01Bullitt]

I have 2001 Bullitt with vortec supercharger. The car has been dyno tunned and is running very well, but in 5th gear @ 19,000 rpms 59 mph & 22,000 rpms 62 mph I get a little hesitation. Do I have a bad
fuel pump? Or is something else wrong? Problem did not start until after car was dyno tuned. I"m tired of taking car to my mechanic.
Its starting to cost me to much. "Help"

[3.8king]

Originally Posted by n2a01Bullitt

I have 2001 Bullitt with vortec supercharger. The car has been dyno tunned and is running very well, but in 5th gear @ 19,000 rpms 59 mph & 22,000 rpms 62 mph I get a little hesitation. Do I have a bad
fuel pump? Or is something else wrong? Problem did not start until after car was dyno tuned. I"m tired of taking car to my mechanic.
Its starting to cost me to much. "Help"

a superchager actually creats boost at high powerband levels.at low rpm levels the engines are actually fighting for the air it intakes,because the supercharger is not creating any actual psi.on that point your best option is to remap you supercharger cpu to create boost lower rpm.thats what i had to do on my supercharged 3.8.you'll gain more low end power but you will level out your egine power.