Ranger Edge 4.0L V6

• Automatic transmission
• 11,000 miles

I have the 2004 Ford Ranger Edge Ext Cab 2WD 4.0L V6 with the 5-spd auto transmission. Since about 11,000 miles, it has had a bad "lurching" once I hit 40 mph. After a bit of letting off the gas to smooth out the ride until the engine warms up a bit, it runs perfectly fine until it randomly, I guess misfires, and will throw you for a ride of checking the gauges to see if any idiot lights are coming up, but none ever do. I have taken it to the dealer under warranty, and have gotten the "It is a lean-idle-out sensor and is perfectly normal" speech knowing good and well they were trying to get me to run it out of the warranty so they would not have to repair it at their cost. There is no way this can be normal when it sometimes barks the tires and causes anything in the truck to slide forward. It will misfire randomly when it is warm and does it rarely. I have ridden with friends who have the same engine in their ranger and their trucks do not have this issue. I also have already had the transmission go out on it before (of which Ford would not honor the warranty because I was 31 days out of the warranty and 6,000 miles under it), and I don't want anything else to go wrong with it. If anyone knows of a fix for the lurching, please e-mail me at ClayXPS@hotmail.com (What happened to Built Ford Tough?).