ok, i have just done a few tests, I hope this can help someone help me. I had the engine running and slowley advanced the throttle, this caused the revs to go up slowley, more importantly, the tps slowley went up with no flat spots at all. though while doing this I did notice that the spark angle did something strange, it went from 12 to 20 to 3 then dropped down to about 8 then after pressing the throttle a little more shot back up to 30 or so, surely this is not normal? i checked this several times and it happened every time, couldthis explain the lumpy acceleration? ( it feels as though I am not firing on all cylinders for a better description