it has the flat dis when i try to crank it the fireing is late.when the engine stop spining i can here fire from the dis. i need info were #1 rotor button is location after i get #1 piston up.when i pull aplug wire and turn over the engine i have weak fire or orange spark.the timeing chain may be off a tooth or something in the crank sensor.ive replaced coil distributor cap and button/plug wires. i want to make sure my timeing is right before i buy a cranksensor