Long story short I purchased a new Smog Pump and had to change it out. I changed the relay but it did not work, a few weeks later the error code came back. I changed the pump but I am still having rough start problems. On some starts the RPM's drop very much almost as if the car wants to die on me. Once it warms it runs like a champ though. Anyone have this problem? I looked online and it seems I may have a volt regulator problem, has anyone had this or has any info about this?