TwinTurbo.NET: Nissan 300ZX forum - Idle issues
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Subject Idle issues
     
Posted by ttsmokin on June 09, 2013 at 10:17 PM
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Message I'll start off with what I have checked:

-Compression all cyl 160psi
-No boost leaks
-New plugs BKR7EIX gapped 0.035"
-New oem TPS set to 0.44v
-Clean throttle bodies

I have disassembled, ohm tested, checked solenoid operation of the iacv unit and cleaned it. Everything is to spec.

I have a stumbling idle which sounds like it is missing, when I pulled the plugs after letting it idle for a while they were all white. My wideband in the left exhaust shows full lean condition (22.4afr). The idle also hunts even with the IACV yellow connector disconnected or disabled in datascan, 30 seconds idle around 850 the next 30 seconds around 650.

A cylinder power balance test shows that the cylinders on the left side (2,4,6) do not have much of an effect as the right side cylinders do (1,3,5).

Is my IACV somehow hooped even though the solenoids appear to function and test OK? Am I missing something here?

     
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