Steve530

The right electric (aux) fan on a 97 Legacy Outback does not run when the AC is switched on. Isn't it supposed to run when the AC is on? The fuse is good. What's the likely failure?

That is correct. When the fuel misture is lean, the engine runs hot and NOX is produced but almost all of the HC is burned and little CO is produced. When the misture is rich, some of the HC is not burned and CO is produced. The engine runs cool because of the excess HC and little NOX is produced. The catalytic converter oxidizes CO to CO2, HC to water and CO2, and reduces NOX to N2 and O2. A properly opeating catalytic converter can mask problems, though. Anyway, after looking at the results again, it seems that your engine is running lean. The catalytic converter ma or may not be bad. Considereing the cost of a converter, I'd have the exhaust checked with a gas analyzer before I replaced the converter.

Thanks. That exactly what I was looking for.

I agree that the engine may be running lean or the cat may be bad. I think the low HC and CO tend to rule out the cat, though. I think I'd check for air leaks downstream of the MAF. You may need to take it to a mechanic with an analyzer to find the problem. Good Luck.

This is a 97 Legacy Outback. The car has an aftermarket alarm and the original keyless remote door lock system. Everytime I disconnect the battery, the keyless system starts flashing the lights. Does anyone know how to disable the original keyless system? Can I just pull the power wire going to the keyless system?