Hey, so I have had my 1997 crew cab since end of last year, and it has always had this stumble under acceleration from 1500-2000ish.. It doesn't do it all the time, but it does do it most of the time. SO the truck since I purchased it has gotten, 6637 intake, electric fuel, south bend single mass kit, black and grey cps's (black in her currently). It also has (was on the truck when I got it) downpipe, US Gears Overdrive, Banks I/C, superduty intake boot, and it until today had a Banks Ottomind chip on it. I haven't driven it far yet, but I couldn't get the truck to stumble without the chip, but now that I am in the new stock hp world, it feels like it may (I haven't driven many of these) slight miss under acceleration. My question is, should the truck accelerate smooth all the way through the RPM band? Its hard to explain, it may not be that it isn't smooth but it gets rumbly, could be exhaust rumble too, but I know its not as smooth as the truck is running down the highway at 17-1800.. Any thoughts on if the chip maybe is just intensifying a miss, or if the truck sounds normal now??