A MAP sensor is simply a vacuum gauge connected at the engine’s intake manifold and provides the ECU with engine load information. However, in our project a small DC motor is used to work as an engine to drive the distributor. Without the piston runs down inside a cylinder when the throttle is running at idle or at partly open position, vacuum cannot be produced for the MAP sensor. so a fixed value of 5 volts can only be sent to the ECU which is the atomosphere pressure voltage. so we decided to use a special electronic device to simulate the MAP sensor.
Except the for the PicAxe 08M chip, all the components can be bought as a kit at the price of about $ 10 from Surplustronics. The chip costs another extra $ 4. The kit includes a 22 K resistor, a 10 K resistor, a capacitor, programming unit and also a connector for programming.
without programming this unit is nothing more than a electronic device. this is the first time we acutually get into the touch with programming and it is not hard at all.
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