Denso vs. OEM O2 Sensors.. Not the same?

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I've posted this several times but I'm not sure people get it .

The O2 sensor is the keystone device for determining Air Fuel Mixture .So as long as the ECU is seeing the value from that sensor that it wants to and other trim values are in tolerance then it's happy.

Plugging who knows what sensors and driving around for a gazzilion miles with out a CEL light doesn't mean anything as far as metering the fuel properly.

That said, I'm running the denso sensors and have verified with a wide band sensor that the fuel ratio is correct .14.7 afr
 
inkpot said:
Howdy! We have been having meetings with Forest Service all week. Should be around the shop Friday and Saturday. No, my cat is not stock. I have a single unit that is very small and makes it easy to run the exhaust over the frame like the 93-94 models. Much more clearance that way. Passes smog easy. Come on by when you have a chance. John
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Thanks John! I ordered up a Denzel from Amazon, but this morning my check engine light disappeared!
 
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Working with OBD a lot (not cruisers but relevant), I have found if you have 'one of those cars', the type that throw a code at the first hint of a problem, and spends more time in the shop than with you driving it, then go OE. If this is a 'one off' and the codes are consistent then go with the cheaper option. I have done a fair amount of work with Jeeps, yeh alright, alright, give me a break there are plenty here OK? The classic is the TPS code, fit a copy and the code will be back in a few weeks. Put in OE never see the code again. In some cases when a new part was not available I have pulled them from the wreckers yard, I often see second hand parts with better tolerances than new copies!

regards

Dave
 
I just got two codes today.
P0130 and P0133

Should I replace both of them "while I'm there"?
Reading here I found Denso 234-4157 for downstream and 234-4157 upstream.

I also read about splicing the 234-4157 one, but can't find anything specific to this mod. Any ideas?

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California truck. Not a lot rust anywhere. Probably due to a lot of heat they might be "welded".
12mm is simply too big. It spins around the nut almost freely. They don't look rounded either. I'll try some SAE.
 
It seems all my 12mm box end wrenches are off.
I tried a 12mm impact socket and it fits perfectly. No WD-40 or anything needed. Really easy to get out.
Waiting for the parts to get here in a few days now.
The outer most nut for the upstream is hard to get to, especially when using 1/2" sockets and such, but it works... 1/16th of a turn at a time.
 
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