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Re: LS Sensors - what they do and where they are
I don’t think any of those descriptions are completely accurate. I am not trying to be rude. I don’t know how else to say it.
Mass air flow sensor: measures the volume of air entering the engine
Air intake temp sensor: measures the temperature of the air entering the engine
Idle air control valve: controls the amount of air entering the engine when the throttle is closed(only installed on drive by cable engines)
Throttle position sensor: measures the angle of the throttle
Manifold absolute pressure sensor: measures pressure(or vacuum) of the air in the intake manifold
Camshaft position sensor: measures camshaft position
Crankshaft position sensor; measures camshaft position
Knock sensors: measures spark knock
Coolant temperature sensor: measures coolant temperature of the engine
Oil pressure sensor: measures engine oil pressure
Oxygen sensors: measures unburned oxygen in exhaust
Vehicle speed sensor: measures vehicle speed.
Sensors by themselves are not able to make adjustments to the engine. The pcm uses the info it gets from the sensors to make adjustments to idle speed, injector pulse, and ignition timeing.
The knock sensors will not shut the engine down. The pcm uses the info it gets to retard/advance ignition timing. It will not cause the pcm to adjust fuel injector pulse.
The oil pressure sensor will not shut the engine down. You can unplug the sensor and you can start your engine and run it. The afm(only if your engine has it)will be disabled if the pcm doesn’t see oil pressure.
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