What to Do When Cylinder 2 Has Insufficient Compression?
2 Answers
The solutions for insufficient compression in cylinder 2 are as follows: 1. Check the spark plug and ignition wire: Ensure the spark plug gap meets the manufacturer's technical standards, and the resistance of the ignition wire complies with technical requirements. Adjust or replace if necessary. 2. Inspect the fuel pressure system: Check the fuel pressure gauge and its components. If the pressure exceeds technical specifications, replace the fuel pressure regulator and fuel filter. 3. Examine each cylinder's injector: Let the engine idle, disconnect each injector connector one by one. If there is no change in engine idle speed and stability when a specific injector is disconnected, measure the injector connector's resistance to see if it is between 10~13. Replace the injector if it does not meet the standard.
I previously encountered a severe engine shaking issue, and upon inspection, it turned out to be insufficient cylinder pressure in cylinder 2. This is quite common because inadequate cylinder pressure directly affects the engine's balance. The main causes are worn piston rings or poor valve sealing, leading to air leakage during compression. It's recommended to immediately use a cylinder pressure gauge to confirm the issue. If the reading is below 70 psi, it should be taken seriously. The first step in addressing the problem is to check the spark plugs and related ignition systems for any issues to rule out simple faults. If internal damage is confirmed, the engine will need to be disassembled to replace the piston rings or cylinder liners—this isn't a job you can handle on your own. It's best to seek out a professional repair shop, as they can accurately diagnose and fix the problem. For regular maintenance, make sure to change the engine oil and air filter periodically to prevent excessive carbon buildup, which can lead to such issues. Be alert if you notice a lack of power during acceleration or increased shaking while driving.
