il try the pipe thing soon taggy also the plugs electrode was clean use normal carbon, it was just the 1 and 4 plugs thread with slight oil so slight it can hardly be seen had to touch it and then saw on my finger also il get a compression tester of somebody , last time is was between 147 and 150 in all cylinders? and that was with no throttle and king lead was on. the head on my engine is likke new only been 500 miles i got valve stems replace , head skimmed, head shimmed for cams etc etc all work was done by engineer to head so i dont see it being head, it used to smoke before i thought i