How to Fix the Jerking When Accelerating a CNG Vehicle?
2 Answers
When a CNG vehicle experiences jerking, you can check the working condition of the pressure regulator. Here are the specific steps for adjusting the CNG pressure regulator: 1. Adjust the idle solenoid valve: First, keep the throttle opening unchanged, then manually adjust the idle solenoid valve and power valve to achieve the highest engine idle speed. 2. Adjust the idle screw: You can adjust the idle screw to maintain the engine at the lowest stable speed. After repeated adjustments, the vehicle's minimum idle speed under CNG conditions can be obtained, ensuring consistent idle speed between gas and fuel modes, resulting in smoother engine operation.
When it comes to CNG vehicle acceleration hesitation, I have to mention a few common solutions. I've experienced this myself before, and it's mostly caused by unstable gas supply, such as a clogged CNG filter or a gas leak in the pipeline. Then there's the ignition system issue—old spark plugs or faulty high-voltage wires can cause the spark to lag behind speed changes, making the car jerk. Another possibility is a stuck air flow sensor or fuel injector, leading to incorrect fuel mixture ratios. I recommend starting with the simple fixes: check the filter's cleanliness and try replacing the spark plugs. If there's no improvement, using an OBD scanner to read the codes can help pinpoint the fault. It's best to visit a professional CNG repair shop—they're experienced and quick, avoiding any accidental damage to the circuits from DIY attempts. Hesitation not only affects driving comfort but can also damage internal engine components over time, so regular maintenance is key.
