What are the reasons why the Excelle has fuel and electricity but won't start?
3 Answers
The reasons why the Excelle has fuel and electricity but won't start are: 1. Abnormal cylinder pressure; 2. Failure of the fuel supply system or ignition system; 3. Starter damage; 4. Open circuit in the low-voltage input line. The solutions for the Excelle having fuel and electricity but not starting are: 1. Check, test, and replace the spark plugs; 2. Confirm the quality of the gasoline; 3. Check and clean the throttle valve; 4. Inspect the ignition switch; 5. Test and inspect the relevant components of the starting and fuel supply systems. The Excelle is a compact car under SAIC-GM Buick, with body dimensions of: length 4468 mm, width 1765 mm, height 1469 mm, and a wheelbase of 2611 mm.
Last time my Excelle had the same issue. The fuel gauge showed full, the battery light wasn't on, but it just wouldn't start. I first checked the fuse box and found two starter system-related fuses were blown. Replacing them didn't help, and later I learned it was the starter relay that failed - this thing controls current to the starter motor. There was also a spark plug problem; when I took them out, they were completely carbon-fouled and couldn't produce any spark. Also, pay attention to the crankshaft position sensor - if that fails, the engine ECU won't know piston positions for fuel injection and ignition. For older cars, it's good to check the camshaft sensor wiring for any wear or short circuits. Anyway, replacing the relay and spark plugs fixed mine back then, cost me about 200 yuan.
My Buick Excelle has reached 130,000 kilometers and exhibited the same issue last winter. Although there was power, the starter motor clearly lacked sufficient RPM during ignition. Using a multimeter, I measured the battery voltage at 12V under no load, which is normal, but it dropped to 8V during startup, indicating the battery is aged and can no longer hold a charge. There was also a fuel pump issue—fuel gauge inaccuracies are common. At the time, I opened the rear seat and listened for the 'humming' sound when turning the key to the ON position, but heard nothing, confirming the fuel pump had burned out. The ignition coils should also be checked—just hold a screwdriver near the high-voltage wires to see if sparks jump. It's also worth inspecting whether the throttle body is too dirty, as buildup can affect startup airflow. The most frustrating incident was when the anti-theft system inexplicably locked, requiring me to close the door and re-pair the key to resolve it.
