I replaced the timing belt and the idle but no the tensioner, I took the cover today to check timing marks and are good but i notice the tensioner mark is a little bit out of the first mark, but i don't think this can cause a problem because the belt has not skip or jump any tooth. I phone the dealer and they can NOT adjust the timing thru the ECU. Car idle at 830 rmp, ignition timing advance of piston 1 is at 4 deg, jumping from 2 to 8, that is when i notice shaking. what's your timing advance?