havent come back with the air box part but.i think the tick over is good now i took off the ISCV like u said gave it a good clean,put it back together, started it up,it was a little better then i noticed the pipe going to it it was basicly sucking it self to death so nothing could get through does this make any sense?? would this cause a problem ?? it's changed now anyway the real test will be when it's cold i would think