Hi, I have a 62plate qashqai 1.6 petrol n-tec auto about 60k miles. I have an intermittent issue where all of a sudden when driving the revs drop completely, I can accelerate but very slow. I was going up a hill today fine and all of a sudden the revs dropped again but as I was on a hill I lost a lot of speed, from about 35mph to about 10mph, it allowed me to keep driving really slowly but as I was on a hill it wouldn't go any faster then all of a sudden the revs shot up and it went back to normal, I have taken it to 2 garages and they think it's a wiring issue but cant find the fault, has anyone had similar issues or any advice?
Thanks
Dan