are you obd2? Using the ecu that came with the engine? Throwing any cel error codes? take the valve cover off, set the crank to the white line to the line that is angled on the timing belt cover and make sure the cam gears line up with the marks on the gears(checking that your not a tooth off). Also if you have a timing light, connect it up to plug #1, by the crank and see if it hits the white line on the crank to the line on the lower timing belt cover.