I just replace the distributor on 2001 v6 not sc. On park and neutral it will accelerate fine. But on drive it will go to 3000rpm normally but then it will go quickly and jump to 2000rpm and it stay there. I can go up to 55 mph but I have to press gas pedal down. A friend and I move the distributor multiple times and got the timing to 0 degrees but still does it. I need any suggestions of what it could be.