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2002 Viggen - New DIC, GS V.2 downpipe and racecat, MAF, o2 sensors, plugs gapped at .039"
Earlier in the year I tripped P0420 ("Catalyst operating below minimum efficiency" or something similar) several times, and replaced the O2 sensors and no problems until within the last 3 weeks, and I've tripped it several times now. It happens out of nowhere, always when I'm driving it really easy (minimal load on the engine). I don't know what else to turn to as far as bad parts would be concerned. Any ideas? this is driving me crazy!
posted by 146.129.120...
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