Hey, I installed my fuel filter, still wouldnt start. Then while looking around the carb, i noticed that the little rubber boot thing that goes from the air filter box to the metal carb intake thing wasnt completely on, there was about a 1/4 of an inch of open are going right in, put it on, still nothing. It then sat for about 5 hours until my dad got home and we checked all the plugs and wires and compresion and it started. I have no clue why but im thinking it wasnt because of anything we did. Anyways, i noticed on that last post that my cat could be bad? And it makes a knocking noise? About two months ago i began to hear a knocking noice coming from beneath me somewhere, i never was able to locate where it was coming from, but could it be my cats bad? If so would that really cause my car to sputter and die?