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Discussion Starter · #1 ·
Hey all...
Perhaps someone here can help me out. I just had both oxygen sensors replaced on my car (a 97 Accent SOHC) after the check engine light came on and I had the codes pulled from the ECU. Before I had the work done, the car was using a lot more gas than usual (because of the faulty O2 sensors, I assumed, as the ECU wasn't getting the correct info to regulate the fuel flow). But it hasn't gotten any better since, and in fact almost seems to have gotten worse. I've driven a little more than 1,000 km (~600 mi) since the sensors were replaced and the check engine light hasn't come back on, at least not yet.
Has anyone else had fuel economy issues with their Hyundais, and specifically with an Accent? <img src=/images/forums/snitz/disapprove.gif width=15 height=15 border=0>


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Edited by - cdchase on 02/04/2002 06:31:48 AM
 

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Discussion Starter · #3 ·
Thanks for the reply, Random. The plugs were replaced at the same time the O2 sensors were. Your suggestion about the cat is just what I was afraid of hearing. It doesn't feel like the cat is clogged at all, though I don't know if that would necessarily happen in such a short period of time. The car still has good power, and the engine is not running hotter than normal (which, I believe, would indicate an obstruction in the exhaust).
If the cat was clogged or damaged, would that not throw off the readings of the upstream and downstream O2 sensors? The check engine hasn't come back on, and I've driven almost 1,200 miles (1900 km) since the O2 sensors were replaced.
And to paraphrase your signature, I would say, "leave it to OBDII to needlessly complicate things!"
Thanks a bunch for your suggestions,
Chris.



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Discussion Starter · #5 ·
I live in Ottawa, Ontario, Canada, and yes, the gas stations do switch to winter fuel, so that is a distinct possibility.
I haven't noticed any loss in power and the car is running as well as it ever has. I'll take a look around for some cat cleaner. Is it sold at auto parts and supply stores? I've never seen it before, but I've also never looked. Would it be similar to that stuff that claims it will make your car pass a smog/emissions test?
Thanks again for the suggestions,
Chris.


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