What Causes Engine Shaking and Stalling During Overnight Startup?
1 Answers
Overnight startup shaking and stalling can be caused by: 1. Low fuel pump pressure; 2. Insufficient spark plug ignition energy; 3. Malfunctioning idle control valve; 4. Excessive intake manifold carbon deposits. Since carbon deposits can absorb a certain amount of fuel, the ECU makes incorrect judgments - while the computer theoretically controls the injection of 100 units of air-fuel mixture, only 90 units actually enter the cylinder. The remaining 90 units of mixture cannot provide sufficient power even with complete combustion. Normal engine operation requires proper sensor functionality, and sensor failures can prevent the engine from working correctly.