What causes the Buick Excelle to make a sputtering sound but fail to start?

1 Answers
VanEden
07/29/25 4:25pm
Here are the reasons and solutions for the Buick Excelle's difficulty in starting: 1. Carbon buildup in the car leading to ignition difficulty: Accompanied by slight shaking at idle, cleaning the throttle body and fuel injectors will suffice. 2. Weak ignition energy from the spark plugs: Failure to replace the spark plugs after the maintenance cycle leads to severely reduced ignition energy, causing misfires. 3. Insufficient low pressure in the fuel system: Low fuel pressure in the low-pressure fuel circuit directly causes the engine to require a second ignition; specifically, check the fuel pressure regulator, fuel pump, fuel filter, and internal fuel lines. 4. Battery depletion: You need to jump-start the car using another vehicle or battery.
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