I have an 82 300TD that is very slow when starting from 0 to 30 mph. When idling and you step on the accelerator it takes a while to get up to the higher rpms, it also crawls up to speed when starting from a dead stop.I have checked the vacum hoses that go to the tranny and they seem to be fine I have the car in mexico and the altitude here is fairly high but the car worked fine up until about two months ago. any ideas?