What could be causing our Mitsubishi Triton to have no acceleration from a standstill?

Our Mitsubishi Triton has no acceleration when taking off from lights, or from a standstill. It eventually cuts back in and has this big gush of power to take off. It also looses power when going from a 80 km/h zone into a 50 or 60 km/h zone. We have taken it to number of mechanics and have had no success in getting it fixed. Any suggestions?

You haven’t told us what model your Triton is, so we can only make general comments. Check the turbocharger, it’s not coming on as it should.