Stock d15 eg with just a test pipe n exhaust( stock airbox) Randomly won't start sometimes and I can't figure this out, Ive cleaned the IACV and tightened the white plastic plunger in the FITV, Checked the O2 and engine grounds but still nothing. So my car randomly won't start(sometimes once a week or 3 times a week or none at all) I have a pulsing idle at start up for about 5 seconds then its fine, Sometimes at stop lights my idle will pulse. I'm confused and about stumped if you have any suggestions let me know thanks H-T.