Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Technical Description: Compensation: Notes
The calculated basic fuel quantity makes the engine run perfectly under normal conditions, i.e. as long as it is warm and the load or engine speed does not change. Occasionally, however, the air/fuel mixture must be corrected so that the engine will run smoothly and emissions will be kept low under all conditions.
The basic fuel quantity is multiplied by a correction factor that is normally 1.00. If the correction factor is changed to, for example, 1.01, then the fuel quantity will be increased by 1%. If the correction factor is changed to 0.98 instead, then the fuel quantity will be reduced by 2%. Closed loop is usually inactive if the correction factor is not 1.00, as the compensation would then be corrected by the closed loop and would not have any effect.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.