So for example at W MAF voltage, and at X throttle position the Lambda sensor should read A. E-manage blue can adjust timing and MAF signalĪs I mentioned at the start, MAF maps are tied into the Lambda sensor signals at idle and maybe under acceleration. The issue arises if the stock map itself is not suitable, for example some car manufacturers make their engines extremely rich at wide open throttle. Why would you want to tune your MAF sensor? MAF sensors are so sensitive they can automatically tune the engine to work with a performance air filter or performance exhaust system. In the stock ECU there is a map which says at X MAF voltage and Y RPM, we want to inject Z amount of fuel. By telling the engine that the engine is receiving more/less air than it actually is the ECU will add more/less fuel. These MAF tuning devices work by altering the signal the ECU sees from the MAF sensor. The standard ECU monitors the resistance of the wire and from the resistance the ECU calculates the mass of air entering engine and from this figure it knows how much fuel to inject into the engine. The resistance of the this wire changes according to how much it is cooled by the incoming air. It does this by passing an electric current through a wire which is exposed to the air entering the engine. So how in principle do these MAF tuning devices work?įirst of all we need to understand how a MAF sensor works.Ī MAF sensor is a device which tells the ECU exactly how much air is entering the engine. This ensures that the stock ECU will not de tune your engine. With the AEM FIC you can alter the Lambda signal that the ECU sees. The only one of these devices that deal with the lambda issue is the AEM FIC. AFC NEO works by manipulating the MAF signal to the stock ECU. If your car uses a narrow band sensor or if your car does not uses the lambda sensor signal under acceleration, changes to the MAF sensor signal should not be retuned by the cars factory ECU. While these devices may have a short-term effect on how the engine is tuned, the standard ECU will learn to adapt to the altered signal from the MAF sensor and retune the engine map back to stock settings. Examples of these MAF tuning devices include:Īll these devices excluding the AEM FIC have one fatal flaw ( if your car monitors a wideband lambda sensor under acceleration) and that is that they do not alter the Lambda signal that the ECU gets.
What are the issues and things to take into consideration when you decide if MAF tuning is suitable for your engine and which product is best for you. By altering the MAF signal you can increase or decrease the amount of fuel injected into your engine. There are many devices available on the market which are dedicated to MAF tuning.
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