I have a 2006 GXP with 96,000 miles. I just replaced a knock sensor from a PO327 code. But now when the car is cold and when I try some heavy acceleration the car appears to quit for a split second. If I leave the throttle down it gets kind of violent but as long as I relieve the gas pedal the car is ok under normal accelerating conditions. Also as a side note the cruise control does not work. Now this all goes away when the car gets up to normal operating temperature, the car will then accelerate normally with my foot to the floor and the cruise control works fine. Sometimes it starts working normally while driving and at other times when I turn the car off and back on but it always within a few minutes after the car is up to operating temperature. Help!