Gnuman Posted February 26, 2013 Share Posted February 26, 2013 Title says it, 96 Outback wagon, 4EAT, 340K miles, took it to get smogged today and it failed at idle, with 158PPM (max is 100PPM). It has been so long since I have had any issues with smogging a car that I have forgotten how to bring down the HC number. Any clues? Quote Link to comment Share on other sites More sharing options...
bendecker Posted February 27, 2013 Share Posted February 27, 2013 (edited) Our '96 Legacy wagon failed at idle too (they had the gall to call it a "gross polluter" ). It was a single bad O2 sensor. I didn't replace it myself, so I don't know exactly what was involved, but it wasn't expensive. It passed with flying colors after that. BTW, our's is a young pup -- only 240k miles. Edited February 27, 2013 by bendecker Quote Link to comment Share on other sites More sharing options...
Fairtax4me Posted February 27, 2013 Share Posted February 27, 2013 Had any decrease In fuel economy lately? When was the last time it got some simple things like plugs wires and filters? Run some fuel system cleaner in case the injectors are dirty. O2 sensor is a good possibility if it hasn't been changed in the last 100k miles. Quote Link to comment Share on other sites More sharing options...
Gnuman Posted February 27, 2013 Author Share Posted February 27, 2013 The O2 sensors are both less than 50K miles old, genuine Subaru, both replaced at the same time, while I had the engine out to replace the T-belt and seals. Replaced the plugs at the same time, as well as the air filter. I have been getting P0420's since before I replaced the O2's and the PO was fond of using really cheap gas (also skimped on maintainance as well, but that is another thread. . .) I am suspecting that it is the cat, but I am really hoping not. I have not yet run seafoam through the top end, and may do that today. I was just hoping for another answer. . . *sigh* Quote Link to comment Share on other sites More sharing options...
Hakim Craddock Posted February 28, 2013 Share Posted February 28, 2013 if you don't want to fix the problem (time, money or both). i know of a way to get you to pass for HC's... You can PM me if interested.. Not really ethical but it usually does the trick I don't want to post it out in the open either. Quote Link to comment Share on other sites More sharing options...
ocei77 Posted February 28, 2013 Share Posted February 28, 2013 There is an auto store item called guaranteed to pass or something like that for emissions testing. Check your local stores. O. Quote Link to comment Share on other sites More sharing options...
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