possible bad rear o2 sensor?
#1
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Thread Starter
possible bad rear o2 sensor?
99 4runner 3.4 a/t 4x4. i was wondering if my rear o2 sensor is out i start up in and it sputters for a second and after that its fine but when its hot(weather) its starts doing it again at a stop i have 1 cat a front o2 and a rear o2 i replaced maf and did isr mod(correctly) i do smell a rich sulfur smell out the back when driving with back window down i did have a new muffler installed since old one spider cracked at the pipe(flowmaster 40 with 3 inch turndown) i do have cel azone said faulty catalyst idk is cat or o2 sensors
Last edited by vegasrunner; 05-22-2014 at 11:59 AM.
#3
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Thread Starter
ok cool so what should i do? ive had it checked at azone but everyone said possible bad cat but sine it only has 130k onit i highly doubt if cat more of a sensor issue correct?
Last edited by vegasrunner; 05-22-2014 at 12:38 PM.
#7
Registered User
It could even be that your PO replaced the cat because of this problem, and didn't fix the underlying cause. Cats rarely die on their own--they are killed by physical damage or by a poorly maintained engine.
How's your fuel mileage? Even money it sucks....
First, I would scan again and post up the actual numeric P-codes for us to look at and not rely on the no-brains at AZ to interpret them. I personally have no advice for you until I know the actual codes being thrown.
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