Unfortunately, virtually all production vehicle ECUs are “locked” to prevent the casual owner from getting a gadget off eBay and screwing up their engine settings so badly it won’t even start. An ECU can be configured to make an engine in a sporty car perform aggressively, while that same engine, in a crossover SUV, would be configured for on-demand power while favoring general fuel economy. Rather, it allows a car maker to produce fewer engine models and put them in a wider variety of vehicles. Modern engines are equipped with electronic ignitions and fuel injectors, so controlling them via a computer system is not only logical, it offers more control and faster/easier adjustments.Īutomobile manufacturers didn’t develop this technology for enthusiasts. The single greatest advantage BMW ECU tunes will have over any piggyback tune is the amount of control and customization they provide, resulting in a far better overall efficiency (e.g., bigger power gains, decreased fuel consumption, increased engine longevity). Setting the idling speed, air-fuel mix in the carburetor, spark plug and distributor point gaps, and ignition timing were common maintenance for older cars, and essential “tweaks” for performance or racing ones. Tuning your engine can include adjustments or modifications to ignition, fuel delivery, and more. But it can also be used to improve fuel economy and prolong the life of an engine. The majority of these “tweaks” are done via the ECU, (Engine Control Unit), sometimes referred to as the ECM (Engine Control Module) Commonly, adjusting the ECU is done to increase performance.
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