What are the reasons why the Roewe 550 has electricity and fuel but won't start?
2 Answers
The reasons why the Roewe 550 has electricity and fuel but won't start are as follows: 1. Check if the battery voltage is too low: Turn on the headlights and some electrical devices, and observe whether the instrument panel and interior lighting dim during the starting process. If they dim, it indicates insufficient battery voltage. 2. Excessive carbon buildup in the intake pipe: Too much carbon buildup on the throttle valve and idle speed motor prevents the engine's air-fuel mixture from reaching the required ratio, making the vehicle unable to start. The repeated engagement of the magnetic pack and starter relay may also produce a clicking sound. 3. Insufficient fuel supply in the fuel system: This phenomenon is similar to excessive carbon buildup in the intake pipe, as it also prevents the engine from achieving the required air-fuel mixture ratio, resulting in the vehicle's inability to start.
I just helped a friend with a similar issue - the Roewe 550 wouldn't start despite having both fuel and electricity, which was quite frustrating. The usual causes are problems with the ignition system, such as aged spark plugs or carbon buildup preventing spark generation to ignite the fuel. It could also be due to ignition coil leakage or poor contact, especially common in humid weather. Faulty sensors like the crankshaft position sensor can prevent the ECU from receiving signals and allowing startup. Even with a functioning fuel pump, clogged injectors or unstable fuel pressure may cause starting failure. The anti-theft system mistakenly triggering can also lock the engine. The diagnostic method is simple: first listen for fuel injection or spark sounds during startup - if absent, check spark plugs and wiring; if sounds are present but no ignition, test sensors and ECU. My advice is not to tinker blindly - visit a professional repair shop promptly for diagnosis to prevent minor issues from becoming major troubles.
