Hi All, Need Desperate help and advice, I bought estima 2004 automatic last year it's import model, over last 2 months when I drive the car and goes over 40 the is a engine raving, also there is an engine symbol on dashboard, but when I go over a speed bump the sign goes off. I was advised speed sensors and I bought 2 speed sensors and the garage changed them. Problem is still there I was advised it could be gearbox, taken to gearbox specialist and they have advised it could be electrical i