Real Jeeps have dents
Join Date: Apr 2002
Location: out in the garage - Minneapolis
That is some sort of MAP sensor modification to Hot Rod your Jeep. Remove it and throw it away.
The Manifold Absolute Pressure (MAP) sensor senses the air pressure inside the intake manifold. The intake manifold pressure is converted into a voltage signal that's transmitted to the engine's computer which then determines how much fuel the engine needs. Under low vacuum conditions (WOT, throttle suddenly opened) the MAP is higher, the MAP output voltage is higher, and the injectors are held open for longer to inject more fuel into the cylinders. Under high vacuum conditions (throttle closed, deceleration), the reverse applies.
The MAP sensor is basically a three-wire pressure sensitive variable resistor. The three wires are the 5.0 volt input, output voltage to ECU, and the ground wire. By increasing the input voltage you can increase the output voltage to the ECU which will increase the injector duty cycle and supply more fuel. The reverse also applies. You can fine tune your air/fuel mixture with this mod.
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