If your original engine got a crankshaft position sensor, your need to replace it with the same.
The Electronic Control Module (ECM) or your computer system in your car uses crankshaft position signal to determine the engine RPM, crankshaft position and engine misfire. The Crankshaft position signal combined with the camshaft position signal indicates the cylinder that is on compression and the ECM can determine from its programming the engine firing order. (Based on toyota repair manual)
In short, engine will not start without it.
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Monday, December 8th, 2008 AT 8:20 PM