I have a 1984 Jag XJ6 that failed smog for high NOX. The car does not go into closed loop. O2 sensor gives a constant 1 volt reading, dropping down to near 0 when giving it a vacumm leak. Have checked timing, basic CO setting at air flow meter, temp sensor ohm...

FIX posted 4/27/2009

iATN Members:
Login to view full TechHelp request
Auto Repair Pros:
Join iATN to read this TechHelp request
Vehicle Owners:
Find a nearby iATN member to repair your vehicle