Car seems to surge randomly when its in drive then idles poorly at a stop in park or drive but returns to normal for short time. Have dtc trouble code 558. Replaced my dpfe sensor and my egr valve regulator, and egr valve, and my iac sensor with no success and still get the trouble code. Sounds like a popping noise coming from my throttle body or airbox. Egr valve also has no vacuum pressure going to it from the regulator. Vacuum pressure jumps and drops randomly when noise starts. Any suggestions? I'm running out of money and ideas. Only two sensors left to replace are my tps and my mad.
Thursday, January 31st, 2013 AT 5:18 PM