| Check the fuel pressure. Check the basics and look for obvious vac leaks. Replacing the basic tune-up parts is fine but won't cause the CO% to be 4X over. Did the smog place try to adjust the CO% to see if it would? Just curious.
Fuel pressure, accumulator, cold start valve are some areas that can dump too much fuel and go super rich. Vac leaks will make the HC go up. O2 sensors are a maintenance item and should have been changed a few times by now. Also the convertors do go bad over time and with it running this rich it's probably history. It might be wise to visit a reputable shop that understands these cars and CIS systems and have them check pressures and stick the emissions probe in the pipe, rather than guess. Throwing some of these parts at it can add up real fast.
Last edited by Dave D : 08-25-2006 at 11:48 AM.
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