What Causes the Lack of Power When the Car Throttle is Fully Pressed?

[LeFrancisco]

When the throttle is fully pressed but the power does not increase, the engine operates normally under no load, but accelerates slowly under load, lacks strength when climbing, and still feels insufficient power when the accelerator pedal is fully pressed. The engine speed does not rise adequately, and the maximum speed cannot be reached, mainly due to insufficient engine power. The following are the reasons for insufficient engine power: 1. Clogged air filter; 2. Improper throttle adjustment, preventing full opening; 3. Low fuel pressure; 4. Clogged or poorly atomizing fuel injectors; 5. Faulty coolant temperature sensor; 6. Faulty air flow meter; 7. Incorrect ignition timing or weak high-voltage spark; 8. Low compression pressure in the engine cylinders.