Sorry guys, another F'ing newbie with what I hope is a dumb question. I'm not sure if I have a tune issue or a wiring issue. I have a 3rd Gen LS that I've modified the harness and installed in a Jeep Comanche. The motor is a stock 2005 truck 6.0 with a LS1 intake and injectors using the truck DBW throttle. The truck starts up and idles fine. As soon as you depress the throttle, the motor goes into a very pronounced surge. At 20% steady throttle, the RPM surges from 1000-1500 with a very consistent cycle.