C
Cush
Guest
with or damaged.? My car is running rough(off and on) and my cousin said that it was the timing chain. I have had some work done on the fuel line and i am wondering if someone could have tampered with it while fixing the fuel filter. it didn't run rough like that before i had them change the fuel filter. I had the fuel filter changed because there wasnt enough gas getting to the engine. I also changed the spark plugs.