why would there be a need to put a catalic converter on a 2011 subaru forester already?

Asked by sbrhel Dec 11, 2014 at 11:46 AM about the 2011 Subaru Forester

Question type: Maintenance & Repair

3 Answers

FordNut answered 9 years ago

http://auto.howstuffworks.com/question4822.htm ..says fouled spark plugs or bad exhaust valves. http://www.bobsmuffler.com/convfail.html and http://www.autoupkeep.com/QAexhaust.htm both say running too rich. Which fits, running too rich will foul plugs

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Chris answered 9 years ago

^^exactly. You could also have issues with the oxygen sensor(s) which can cause too much fuel in the air flow and result in the same issue with the catalytic converter. Additionally, if you have ever seen your check engine light on and your cruise light flashing, it was an indicator that something bad could happen to your CC.

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