Engine Sensors

Engine Sensors provide the correct amount of fuel, the engine control unit (ECU) monitors a variety of different sensors, so you can get the right burst of fuel at the right moment.

Here are just a few of these sensors and how they work with the ECU:

• Mass airflow sensor – Senses the mass of air entering the engine
• Oxygen sensor(s) – Monitors the levels of oxygen in the exhaust
• Throttle position sensor – Detects the throttle valve position and how much air goes into the engine, which affects the fuel rate
• Coolant temperature sensor – Provides info so the ECU knows when the engine has warmed to operating temperature
• Manifold absolute pressure sensor – Senses the air pressure in the intake manifold
• More air means more power for combustion – The more air that goes into the engine, the lower the manifold pressure, so this reading is used to gauge how much power is being produced
• Voltage sensor – Monitors the system voltage in the car
• Engine speed sensor – Monitors engine speed, used to calculate the pulse width

There are two types of multi-port systems:

• the fuel injectors can all open at the same time — or each one can open just before the intake valves do (this is called sequential multi-port fuel injection). If the driver makes a sudden change, the sequential system responds faster because it only has to wait only until the next intake valve opens, and not the next complete revolution of the engine.

More information on Automotive Diagnostics:

• Smart Sensors in Late Model Cars
• ECU Components in Automobiles
• Engine Diagnostic Service
• Engine Knocking
• Check Engine Light On
• Smog Check Engine Repair
• Emissions Repair Service
• Transmission Repair and Service
• What Engine Components are Evaluated

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• Air Conditioning Recharge Service
• Filter Service
• Batterry Service and Replacement
• Air Conditioning repair service