I just recently failed my smogcheck coz my NO spiked from 200s to 2000s comparing my last smogcheck. I had a feeling it was the high idling coz my timing belt was just replaced days ago. I think the mechanic forgot to adjust the timing and i read that that can cause high emission outputs. Theyre not Z specialists so I'm goin to take it back there and hopefully they fix it. If not I'm goin to a Z specialist. Thanks