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If you replace a part and it makes it worse, put the old part back in and start the diagnostics again. It is also possible to buy new sensors that are faulty, especially the ones made in Mexico! Never buy cheap sensors, buy the OEM ones that the maker used.
A $5,000 professional scan tool computer will tell you exactly what the issue is with the vehicle by reading historical and live data.
The crank position sensor is responsible for RPM signal and ignition pulse for the coils . Even new parts can fail . If it is new test it at its connection . Take a multimeter and with it set on AC Volts and touching the crank position sensor pins should read .5 Volts AC with engine cranking over .
i think it's the starter. On most nissans, the starter and the crank position sensor are close to each other. Some nissans have 4 position sensors, between crank sensor, crank angle sensor, cam position sensor, and sensor sensing sensor, oh and cam angle sensor. Oh wait, maybe it's a bad ground. Nope, gotta be the staerter.
the crank position sensor will never tell a vehicle to crank. the purpose of the crank position sensor is to detect misfires and also for engine timing. when a vehicle does not crank you need to look at starting system. check your battery, load test it. check for starter signal to starter solenoid from ignition switch.
Crank position sensor should be in the area of the crank pully the largest pully on the front of the motor held in by one 10mm bolt
The fuel tank pressure sensor can be bought separate but usually comes with a new fuel pump so the sensor is on top of the fuel pump exterior of the tank
Pull crankshaft position sensor straight up out of the transaxle housing.
(Disconnect crankshaft position sensor electrical connector from the wiring harness connector.
INSTALLATION - ADJUSTABLE
All vehicles will be equipped with an adjustable crankshaft position sensor. This can be identified by an elongated mounting hole in the sensor. NOTE: If the removed sensor is to be reinstalled, clean off the old spacer on the sensor face. A NEW SPACER must be attached to the sensor face before installation. If the sensor is being replaced, confirm that the paper spacer is attached to the face of the new sensor Crankshaft Position Sensor and Spacer
Install sensor in transaxle and push sensor down until contact is made with the drive plate. While holding the sensor in this position, install and tighten the retaining bolt to 12 N·m (105 in. lbs.) torque.
Connect crankshaft position sensor electrical connector to the wiring harness connector.
Attach connector to heater tube bracket.
Install speed control servo. Tighten nuts to 9 N·m (80 in. lbs.) torque.
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