My Toyota Corolla is experiencing a rough idle and the check engine light is on. What could be causing this issue and how can I fix it?
ReplyBased on the symptoms you described, it sounds like you may have a misfire in one of your engine cylinders. This can be caused by a variety of issues such as spark plug or ignition coil failure, fuel injector problems, or even a vacuum leak. I recommend taking your car to a trusted mechanic for a diagnostic check to determine the exact cause and address it accordingly.
Before taking your car to a mechanic, you may want to try some basic troubleshooting steps. Inspect the spark plugs and ignition coils to see if there are any signs of wear or damage. You can also check for any vacuum leaks by spraying carburetor cleaner around the intake manifold and vacuum hoses while the engine is running. If the engine idle changes, it's a sign of a leak. If none of these steps work, it's best to have a professional diagnose and fix the issue to avoid further damage.
Another potential cause of a misfire in a Toyota Corolla is a malfunctioning fuel injector. This can be caused by a clogged fuel filter or a faulty fuel injector itself. I recommend having a mechanic perform a fuel pressure test and inspect the fuel system. If necessary, they can replace the fuel filter or fuel injector to resolve the issue.