RICH IS THE CODE · RMS Technical Training

Mar 23 (edited) • Your Own Faults. Videos/pics

RICH IS THE CODE

This vehicle (enhine: QG18) came in for running rough with serious misfires, especially on cylinder #1. The last shop threw spark plugs and coils on this Nissan vehicle, when they saw thatbthis didn't work. They mentioned to the client that they can have the injectors serviced which might solve the misfires issues.

The car was then brought to us to diagnose. One of my team members used the live data on the scan tool to dive in deeper, seeing that parts were already replaced on this vehicle. He recalled that I mentioned to them to create a vacuum leak to create a lean command, this will let you know if the O2 sensor can be trusted if you have a rich condition.

They saw that the ECU was trying to kill the injectors pulse time and proved some more. This is when they found the leaking fuel rail regulator. This is explains the misfires and rich condition. The rail was replaced and the car was sent on its way. Great find fellas.

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