Hi everyone, I have recentelly purchased a 2002 Tribute XL V6 and i noticed a problem with the RPM jumping when i give gas and dropping off to 1200 from 2000 rpm in highway drive also it hesitate when trying to increase speed from around 1200 to jump to 3000 and down again. the car has 65000 miles and so far i have just changed oil, any ideas or things that i should do, i have no records and no manual.

thanks.