Hi guys, got an odd ticking sound coming from somewhere under the bonnet (on intake manifold i think), i start the car up and no ticking at all, touch the accelerator pedal even slightly and i hear it, it's more noticable when cold and gets slightly quieter when warm. it's like 2 or 3 ticks per second (sorry for the odd description) and doesn't change speed when you press the throttle. Any ideas? it's doing my head in even though it's not loud and i hope it's not doing any damage on the new eng