What causes poor engine acceleration?
2 Answers
The reasons for poor engine acceleration are: 1. Fuel system malfunction: A clogged or waterlogged air filter reduces air intake, causing an overly rich fuel mixture, incomplete combustion, sluggish acceleration, and severe black smoke from the exhaust pipe, resulting in weak engine acceleration; 2. Electrical system malfunction: Damaged spark plugs in the cylinder affect acceleration performance; 3. Mechanical failure: Wear of engine valves, cylinder liners, pistons, or rings leads to insufficient cylinder pressure. An engine (Engine) is a machine that converts other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, and electric motors.
I encountered the same issue with my old car's lack of acceleration before. After much troubleshooting, I found the catalytic converter was clogged, causing poor exhaust flow and suffocating the engine. Worn spark plug gaps lead to unstable ignition, and dirty fuel systems with poor injector atomization are also common culprits. If the air filter is clogged black like a pancake, insufficient air intake means no power even at full throttle. Once after maintenance, I noticed sluggish acceleration—turned out to be low-quality gasoline with excessive gum deposits clogging the fuel screen, just like blocked blood vessels causing poor circulation. Minor issues like loose belts or vacuum leaks can also cause trouble; it's best to use a diagnostic tool to read trouble codes for accuracy.
