What Causes Engine Shaking When Warm but Not When Cold?
1 Answers
The reasons and solutions for engine shaking when warm but not when cold are as follows: 1. First, use an automotive diagnostic tool to check for any engine fault codes. If present, identify the faulty sensor and perform the necessary repairs; 2. If there are no engine fault codes, check for any engine misfires. If misfires are detected, inspect the spark plugs, ignition wires, ignition coils, crankshaft position sensor, and ignition coil circuits. Perform the necessary repairs or replacements; 3. If no misfires are detected, inspect the fuel supply system. Remove the fuel line and connect a fuel pressure gauge for a pressure test. A normal reading should be between 270Kpa and 350Kpa. If the fuel pressure is low, inspect and repair the fuel pump as needed; 4. If the fuel supply system is functioning properly, check if the throttle body is clean. If it is dirty, clean it thoroughly with carburetor cleaner. Then, check if the idle air control valve is working. If it is not functioning, replace it; 5. If the throttle body and idle air control valve are functioning properly, inspect the fuel injectors for proper operation or blockages. If the injectors are not working or leaking abnormally, check the injector wiring and perform the necessary repairs; 6. If the fuel injectors are functioning properly, check the compression of each cylinder. A normal compression reading should be 8 or higher. If the compression is insufficient, take the vehicle to a repair shop for the necessary repairs.
