Why Can't a Shacman Delong Start After Parking?

[AdrielMarie]

Shacman Delong fails to start after parking for the following reasons: Damaged carbon canister solenoid valve: During a hot start, fuel atomization is normal and no additional fuel vapor is needed. If the carbon canister continues to supply fuel vapor to the intake tract, it will cause an overly rich mixture, making it difficult to start; Fuel quality: After the engine is shut off when hot, the temperature in the engine compartment remains quite high. If the fuel is highly volatile, it can easily form high vapor pressure in the fuel rail. When this pressure exceeds the fuel supply system's pressure, it creates vapor lock, causing the fuel injector to spray overly lean fuel vapor, making it difficult to start.

[FelicityMarie]

I've been driving trucks for over 20 years, and most cases of Shacman Delong failing to start after parking are due to battery issues. Especially for older vehicles, the terminal posts are prone to oxidation and loosening, leading to poor contact once parked. Next is the fuel system - clogged diesel filters or air in the fuel lines can prevent starting. Once I encountered insufficient engine cylinder pressure where the truck could start when hot after parking but wouldn't after cooling due to compromised air tightness. Faulty air pressure sensors in the air system can also trigger protection mechanisms to prevent starting. For quick troubleshooting, you can tap the starter with a wrench - if it makes a clicking sound, it's usually a sign of low battery power. If all else fails, you'll need to use a diagnostic tool to check the electronic control system rather than risk damaging the wiring by tinkering blindly.

[LaSebastian]

For heavy-duty trucks like Xiudelong, difficulty starting after parking is a common issue. The first step is always to check the battery voltage—if it's below 10 volts, you'll need to charge it or jump-start. Next, inspect the starter relay; burnt contacts can cause poor electrical connection. For the fuel system, pay attention to the water-fuel separator—if not drained timely, frozen water in winter can block the fuel pump from drawing diesel. Insufficient air pressure in the brake system may trigger the startup protection, requiring waiting until the air pressure gauge reaches above 0.7 MPa. Also examine the crankshaft position sensor, as misalignment can lead to signal abnormalities. Severe carbon buildup in the injectors causes poor atomization, especially for vehicles frequently used for short trips. Regular cleaning of the fuel circuit is recommended to prevent fuel system failures.

[LaHarmony]

Last month, my Delong had trouble starting after parking, and it turned out to be a short circuit in the preheating circuit. After parking, the cooled engine requires the glow plugs to work, but the aging plug caused the system to misjudge the status. Some cars experience signal loss due to worn start buttons, which can be fixed by tapping it a couple of times. Fuel quality is also important—using high-grade diesel in summer can lead to poor fluidity in low temperatures. Additionally, don’t overlook the battery bracket, as road bumps can loosen the mounting bolts and cause power loss. Although rare, faults in the anti-theft module can occur, and diagnostic tools may fail to read the codes, requiring a replacement of the computer module.