Hi. I,m Ron, my engine cuts out at 3,100 rpm.If I let the revs die down the engine then performs perfectly until 3,100 rpm is again reached.Help please.Also when I raise the suspension to maximum height, then return to normal,the right rear goes slightly lower than the left. Is this adjustable? vehicle is left hand drive. Mileage only 96,000 kilometers. Ron, Ps Am a better mechanic than I am on the computer!