Hi. My Ford Ranger engine just dropped from 3000rpm to 1500rpm whilst I was doing 100km/hour and tried to accelerate but it wouldn't reach 2000rpm and the car had no power. I then pulled into a garage and filled with 12 litres of diesel and started the car, it went back to normal, I then drove for about 4 km further then the car engine jus died. It cranks but won't start. I need the car to be diagnosed and repaired Thank you.