1992 Nissan 300ZX Q&A
1992 Nissan 300ZX Question: why does my car idle at 2000rpms ?
ck for vac leak, if you can't find one have a smoke test done and that will find it - globalhelper
yes do check for vaccum leak, the older nissans had issues with idle air control valve and ecm going bad causing to be unable to control idle. - holston2008