What should I do if my car runs rough?
What should I do if my car runs rough? If the engine runs rough or misfires, it could have a clogged carburetor. Rebuild or replace the carburetor if it's clogged. If the engine runs rough after hitting a rock or stump, check the flywheel key-a damaged flywheel key will disrupt the ignition timing. Check for fuel, oil or carbon deposits on the spark plug. What causes a riding mower engine to run rough? The carburetor mixes fuel with air to create a combustible mixture that enters the engine cylinder and ignites to drive the piston. Impurities in gasoline can clog...