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Message: <blockquote data-quote="c-ground" data-source="post: 1744462" data-attributes="member: 11426">I have just posted this in other forum and I think it helps in understanding what grounding and voltage stabilizing are all about:All production cars has the body/chassis & engine block/alternator as a "common ground", where all electical/electronic systems are grounded to. Some manufacturers already have implemented factory voltage stabilizer, either as a separate or an intergrated module in the ECU.Electricity is all about Voltage, Current and Resistance as we can see from the Ohm's Equation: V = IR. We can see that voltage and current is interrelated by a factor, which is the resistance. Resistance wastes energy, reduced resistance improves efficiency - simple physical law.Therefore, grounding is mainly to reduce energy lost with end result of improved efficiency in all electro-mechanical related areas.Now, we talk about signal. Almost all the sensors in an EFi engine produce signal in voltage. The ECU sends reference voltage to the sensors and the sensor signal is processed based on the deviation of the two voltages. Accurate signal is important for accurate computation and accurate actuation - a/f trimming, ignition timing, etc. However, with all the electrical noises generated by the ignition system, fuel injectors, intermittent operation of a/c compressor, etc, the voltage is never near "clean" and "stable". The electronic system is designed to tolerate the noise, but not without extra load.So, voltage stabilizing is mainly to filter the voltage spikes in the electrical system, with the end result of improved accuracy in electonic related areas.In simple words: Grounding is a NEED, it needs to be efficient. Voltage stability a WANT, we want it to be accurate.</blockquote>

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