I don't smell any gas. and I have gone over the timing a few times. I turned the crank pully till the mark lined up with the zero them pulled the valve cover off and the cam sproket mark is pointed up at 12:00 and the rotor is pointing at number 1 on the distributor and rocker arms on No. 1 cylinder are loose and No. are tight. So every thing lines up so the timing should be wright, wright?