My '92 940 is failing its state emissions test with excess NOX. So far, I've replaced the distributor cap and rotor, the oxygen sensor, and the engine been tuned for about a year. Last summer (2003) I replaced the catalytic converter with a aftermarket converter, when it failed the emissions test last year.
Giving up, I've taken the car to the dealership. They are saying I need to replace the catalytic converter -- another $500, saying that their experience is that the aftermarket converters don't distribute the exhaust gases sufficiently to do their work. My question to the forum - "is this reasonable?", "do I need to replace the converter this quickly?" My bill is already $450 -- add another $500 and I'm at a whopping $950, so I'm all ears. Thanks guys.
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