Guv

Reviving a zombie thread from the glory days - and registered - just to say WOOT! Thanks guys, prolly saved me a packet 'troubleshooting-by-replacement'! Anyhow, just to confirm blocking the PCV tube downstream of the TB dropped a high, surging idle on a 2008 Nissan 350z VQ35HR (that had just stupidly had its TB's cleaned) down to around 850rpm - and allowed an idle relearn to run & stick. It now sits on 650rpm and ~15deg BTDC. Pretty much perfect! After reading soooo maaaany threads on this topic - generally without resolution (other than TB/ECU replacement), I figured it might be worth posting my thanks and confirmed resolution and hopefully gaining you a few Google search ranking levels in the process ;-) Cheers, Guv