if it's a ATX non-SVT V6, don't worry, mine does the same thing. It's a little thing called the rev-limiter. It idles once i hit 4000 but, then very quickly tries again, and again, and again, never going below 3500 while flooring it all the way.
1999 Contour SE (Spruce Green) ------------------------ SVT Front & Rear Bumpers SVT Side-Skirts SVT Dual Exhaust '17 Team Loco 142 Rims 215/45/17 Sumitomo HTR Z Tires Donnelley Mirror w/ Temp. & Compass *Elzonian@aol.com*