\whats happening here is your listening to too many people. the camshaft sensor should of been checked with a multimeter to see if it was working b4 replacing it most people with a scanner automaticly replace a sensor when they throw a fault up when in fact they are working well and reporting the fault to you. your symptoms definatley point toward the cam sensor. your next step is to check the wiring that feeds the cam sensor and i dont mean a look at the bits you can see. unless you can find pin data for your car youl have to do it the hard way. each wire going into the cam sensor has a number printed on it. now go to the multiplugs that go into the ecu and one of them wires will have the same number on it. get a multimeter and set it for continuity and put one end in the ecu multiplug and the other at the cam sensor end and check the results. other areas to have a quick check are the inlet manifold for leaks ( try tightening the bolts) also the exhaust for holes i doubt its any of thees 2 but it just rules them out. if the wires turn out ok then remove the timming cover and check the camshaft sprocket for any damage and get back to us