TwinTurbo.NET: Nissan 300ZX forum - Rough idle solved by turning PRVR on during idle
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Subject Rough idle solved by turning PRVR on during idle
     
Posted by Metacom on March 24, 2017 at 7:19 PM
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Message Today I was still tryin to diag a rough/irratic idle on my 96NA Z32. I noticed that when I turn the pressure regulator vacuum relief solenoid on during idle with Conzult ...the engine stops stumbling, sounds healthier, and smoother. Pretty much solves the problem.


Im trying to figure out why activating the PRVR would cause that. As I understand, its meant to be on for 30 seconds after a hot start to relieve negative pressure.

Fuel Pump is good
FPR is OE new
6 new OE injectors
Filter is new
All rubber lines replaced
No vacuum leaks

     
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