so far i've only been checking spark at #1 and #3 plugs. i talked to a local mechanic yesterday who said to check all 4 at the coil pack. he said that the cam sensor could be bad and only send spark to any number or combination of cylinders instead of all 4. as far as i can tell i used the correct markings when setting the new belt. the passenger side cam pulley had a very distinct line stamped in it and was marked white, same for the crank. the driver side cam pulley had a red mark and a white scribble about 1/2 inch apart and a very light stamp in the red mark. i used the mark in the red to line things up since the stamped mark seems more permanent.