Expert: Von Sudderth - 11/3/2009

Question
no injector pulse on 99 altima 2.4 i got spark fuel prersure i replaced the distrubutor i got noid light at the injector but no pulse and at the crank sensor should be 5 volts reference and theres none does the crank sensor control the pulse and the car dont start

Answer
Luis,

The injector circuit is powered when on.  If there is no voltage you need to look for a blown fuse, a damaged wire or that the crank sensor is defective.  You checked for power at the sensor.  Did you check the harness or the output?  The sensor is a hall effect type that lets the ECM know when to fire the injectors.  The ECM grounds the injectors to fire them.  But, needs the reference signal from the crank angle sensor.  Start with the fuses and then check the harness for damage.  Any codes present?