What are the reasons why a Jiangling EFI vehicle won't start?
2 Answers
Jiangling EFI vehicle won't start due to reasons such as air leakage in the intake system, low fuel pressure, clogged air filter, malfunctioning idle control valve or auxiliary air valve, fuel injector leakage, incorrect ignition timing, or faulty crankshaft position sensor. Here is extended information about the crankshaft position sensor: Function: The main role of the crankshaft position sensor is to monitor the position of the crankshaft. It enables the engine's computer to detect the speed signal, thereby allowing the vehicle to start successfully. The crankshaft position sensor is the most crucial sensor in EFI engines and centralized control systems, and it is also a sensor commonly used by both the ignition system and the fuel injection system.
Recently, my Jiangling EFI (Electronic Fuel Injection) car also had trouble starting, which really puzzled me for a long time. The main issue was a drained battery, especially during summer or winter when the car wasn't driven for extended periods—insufficient voltage couldn't even power up the ECU. Another common problem is the fuel pump; if you don't hear a humming sound when turning the key to the ON position, it means no fuel is being supplied. Additionally, issues like a worn-out starter motor that won't turn, clogged fuel injectors, or a faulty crankshaft position sensor can all lead to startup failure. EFI cars have complex electrical systems, and poor relay contact is also a frequent culprit. My advice is to first test the battery—if it's below 12V, try jump-starting it. If that doesn’t work, get it repaired promptly to avoid damaging components by repeatedly cranking. Regular maintenance is key; take short drives monthly to keep the battery charged, which can save you a lot of hassle.
