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How to Resolve Idle Adjustment Problems on All Fuel Systems

Model: Mini Mini Various
Part: Checks and maintenance

Video tutorial

If you have idle adjustment problems, this video is for you: often the issue is insufficient earthing because the cable gets damaged or oxidised, and thus the ECU does not ground properly. The best solution is to connect it either to the negative terminal of the battery or to the car's bodywork.

Take a common electrical cable and measure between a screw on the ECU and your preferred point. The YouTuber connected it to the negative terminal of the battery.

Remove a screw from the ECU, twist the wires together and connect them to the screw, or use a terminal connector; then connect it to the negative terminal of the battery, as the YouTuber did. This operation will definitely improve the situation. Do the same for the other ECU. A grounding issue can cause a range of idle problems.


Updated on 27 June 2026 by ScegliAuto


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by ScegliAuto

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