I have a 2000 montero sport ls 3.0 v6 with 130,000 miles it has a hesitation in drive only when fully warm or cool wether its hot or cold out and your in drive and at a stop light the rpm stick will drop like a little hesitation and the car will shake this will happen every 10 seconds and a stop only at low idle or normal in drive stopped idle. It also may have fuel in oil but not shur but i just changed oil putting the required 5w 30 with a stabilizer in it. also 10,000 miles ago replaced water pump and belts ect. i just replaced the fuel filter and fuel regulator and it still does it. !!! help spark plugs were also done 30,000 miles ago and there the 60,000 titanium rated plugs soooo.....?????? help