Pulled my Error code slow o2 circuit...
12-27-2007 | 07:36 PM
#42
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From: Montreal, QC Canada
The A/F sensor should be more or less a flat line except under heavy accel/deccel. The second O2 sensor should be reading fairly low voltage so I would have to say that either the converter is bad or you have something causing the downstream to show a rich condition.
Contact URD on the pinout for their O2 sim because I remember someone else had a similar problem a while back and Brian got them what they needed.
Contact URD on the pinout for their O2 sim because I remember someone else had a similar problem a while back and Brian got them what they needed.
Last edited by MTL_4runner; 12-27-2007 at 07:38 PM.
12-28-2007 | 01:03 AM
#43
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The A/F sensor should be more or less a flat line except under heavy accel/deccel. The second O2 sensor should be reading fairly low voltage so I would have to say that either the converter is bad or you have something causing the downstream to show a rich condition.
Contact URD on the pinout for their O2 sim because I remember someone else had a similar problem a while back and Brian got them what they needed.
Contact URD on the pinout for their O2 sim because I remember someone else had a similar problem a while back and Brian got them what they needed.
12-28-2007 | 05:34 AM
#44
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From: Montreal, QC Canada
I personally would try a little harder to get the URD O2 sim to work also.
12-28-2007 | 06:16 AM
#45
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No, unfortunately every attempt I have seen to find a replacement for the OEM cats have failed. I have never seen anyone run dual high flow aftermarket cats as a replacement so if you wanted to try something, that's where I'd start. All the companies you find on the net selling aftermarket OEM replacements are complete junk.
I personally would try a little harder to get the URD O2 sim to work also.
I personally would try a little harder to get the URD O2 sim to work also.
I'm curious to find why the CATs failed at such a young age - or at least I think it is young (115,000). The truck has been pampered it's whole life. Always maintained - almost obsessively by myself.
12-28-2007 | 07:03 AM
#46
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From: Oklahoma State
12-28-2007 | 09:27 AM
#47
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From: Montreal, QC Canada
Mike does that on his 3.4 conversions:
https://www.yotatech.com/50673458-post26.html
https://www.yotatech.com/50673458-post26.html
I have 2 questions for you (since those were on a transplanted 3.4L):
1) Were those used on a Cali spec'd 4runner setup (ie 99-00 cali spec or any 01-02 motor/ecu combo)?
2) Was it successful in preventing the P0420 code?
Last edited by MTL_4runner; 12-28-2007 at 09:29 AM.
12-28-2007 | 10:14 AM
#48
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From: Oklahoma State
https://www.yotatech.com/forums/f160...runner-122396/
12-29-2007 | 11:10 AM
#49
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After changing my plugs today, which is - by the way - a fun 1 hour exercise on this truck, I was going through all of my maintenance/repair records for this truck. One thing I had forgot about was that I would add BG 44K to my tank for a couple of years - every 6 months or so. I haven't done it in about a year b/c the place I bought it from no longer sells it. I started wondering - is this stuff OK to use? Could it have contributed to the failure of my CATs?
By the way, my plugs looked fine. A little bit of wear but NO fuel or oil on them. They were NGK. I used Denso this time.
By the way, my plugs looked fine. A little bit of wear but NO fuel or oil on them. They were NGK. I used Denso this time.
01-19-2008 | 08:00 AM
#50
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From: Springfield, mo
I just ordered my sensor. I am going to run a few cans of sea foam through may gas before I change it and spray the old one down with pb blaster. so it can soak for a week or so.
