car came into us as a non runner car would start run for a couple of mins then miss fire and stop plug in car and came up with cam sensor incorrect signal fault so changed both the cam and crank sensors car still the same opened the throttle bodie and cleaned that also opened the rocker cover to check for broken cam shafts have checked spark plugs and coil pack and all plugs are firing checked timing all seems fine car is now no longer running and is now miss firing really badly still have the same code for cam sensor incorrect signal in ecu anyone got any ideas