I just change my spark plugs, distrubutor cap, rotor, air filter. The reason why i did this iis because I failed the emmission test for HC on idle only. the standard was 200 and I got 244. Because the age of the vehicle, I decided the change the above. after the change to my dissapointment, the engine miss, back fired and smell high scent of gas. I repaired it myself and i believed I mix up the firing order of the spark plug wires. Please describe the firing order for my vehicle. A diagram accompanying would be appreciated. Thanks