TwinTurbo.NET: Nissan 300ZX forum - nistune / O2 sensor readings arent even at idle
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Subject nistune / O2 sensor readings arent even at idle
     
Posted by DE944 on January 29, 2014 at 10:53 PM
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Message I recently replaced the LH head gasket on my N/A. I thought I would see how she is doing after the job was done. I plugged in my nistune and noticed something strange. At Idle (fully warmed up) the LH sensor sits at 15 and the RH sensor sits at 80. At speed (2-3000 RPM) they both bounce evenly as they should. Can someone tell my what the readings at idle should be, and why the 2 sides are so different?

The timing is spot on at 15 degrees, and the mechanical timing is also spot on. RH compression is about 180 across the whole bank. LH compression is about 150 across the whole bank. 276K on the stock motor. 30k on the O2 sensors.

     
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