Miata Crank Position Sensor Symptoms

This sensor uses a reluctor to gauge the position of the crank.

Miata crank position sensor symptoms.

It is a circular metal unit that sits right on the rear of the valve cover. The camshaft position sensor gathers information about the vehicle s camshaft speed and sends it to the vehicle s engine control module ecm the ecm uses this data to determine the timing of the ignition as well as the timing of the fuel injection that the engine requires. If your miata is a 1990 or 1991 with vin 209446 or less you have a crankshaft with a smaller diameter nose. According to mazda the european spec mx 5 breakpoint is at 127442 the pulley bolt shoulder diameter is 1 128 inches.

It monitors the position and rotational speed of the crankshaft and sends the information to the engine control unit so it can make appropriate adjustments based on operating conditions. The crankshaft position sensor is an engine management component found on virtually all modern vehicles with internal combustion engines. When the miata s ecm determines that there is an issue with the signal coming from this sensor it ll throw the p0335 trouble code. In this video i will show you how to replace the crankshaft position sensor on my 2001 mazda miata mx 5.

Without this information the engine would not be able to function properly. For 1 6 liter engines locate the crank angle sensor close up view at the rear of the passenger side valve cover close to the firewall.