New 02 sensor?Myth or not?

[viperkiler]

I heard theres a new o2 sensor out there thats only 25 bucks and it does really well under the conditions with race gas.I forget the name i heard but if anyone knows anything about this please tell me more.Whats it called and more important where do i send my money?

 

[Mustang 1]

The 0-2 thatyou are refering to is made by Denso.It is not available at Autozone.They care Bosch.I put one on my car like 400-500 miles ago and replaced it yesterday.I ran near 100 percent 110 leaded and also had a bad fuel pressure gauge and was running like 65psi at idle.The combo of leaded and excessive rich caused the early demise.Just call all your local parts stores.Only one in my area caries them.Check any Federated backed parts store.Usually your smaller mom and pop stores.I got mine for 25.00.

 

[Super6]

denso

I have the single wire denso lead proof sensor and it has seen appox 35 gallons of 114 race fuel. It is still as active as the day i put it in. ac's and bosch's don't even come close to the denso.............Bob

 

[Two Lane]

And whenever you get tired of buying/replacing the outdated unheated 02 sensors, get the 4-wire heated sensor conversion package from www.casperselectronics.com.

May be the last time you even think of an 02 sensor again!

HTH

 

[jshilli1]

you can also get the denso at www.sparkplugs.com

 

[lrover2]

Maybe I am unlucky but I ran 6 gallons of 114 through mine and started throwing a code 13 the next tank of unleaded.

 

[bruce]

I'm convinced it's the brew of the fuel that kills sensors. The life expectancy is just too erratic. Mix in the various EGTs and backpressures, and it's even more erratic, IMO.

 

[ijames]

Originally posted by Two Lane
And whenever you get tired of buying/replacing the outdated unheated 02 sensors, get the 4-wire heated sensor conversion package from www.casperselectronics.com.

May be the last time you even think of an 02 sensor again!

HTH

And when the heated AC sensor fails, you can get a heated Denso to replace it. I don't know of anyone who has done that yet - all the good reports so far are about the one-wire 234-1001 unit. The 3 wire Denso to replace an AFS109 is 234-4018, and the 4 wire Denso to replace an AFS74 is the 234-3005. Please, if anyone starts using these, give us feedback on price and how long they last.

 

[Super6]

Maybe I am unlucky but I ran 6 gallons of 114 through mine and started throwing a code 13 the next tank of unleaded.
What brand of race fuel are you running? I am running sonoco 114.....................................................thanks Bob

 

[Two Lane]

Originally posted by ijames
And when the heated AC sensor fails, you can get a heated Denso to replace it.

The heated-02 in the Casper's Conversion is not an AC brand unit.

John did an excellent post on a prior 02 thread wherein he stated another brand was preferable, due to his good experience with another faster, more durable sensor.

Honestly can't think of one logical reason any one would "prefer" to continue buying and using a non-heated sensor.

The cost of the conversion is essentially the cost of a couple of non-heated sensors, and the kit comes with what very well be the last 02 sensor you'll be needing for a long, long time.

HTH

 

[azgn]

I disagree....why would a heated 02 last longer?

the only reason heated 02's were used was to get cars into closed loop sooner....smog rules

there is a belief out there that if you turn the ignition on and let the 02 heat up, some of the leaded crap will burn off.....my experience says otherwise.....the heated 02's last a bit longer, but if you run a lot of leaded fuel, you will be buying 02's regularly

that said, the Denso's seem to hold up a bit better (and they are cheaper)

I have a Denso in my car that has a bunch of miles on it with straight 116 leaded....it is still very active and useful for tuning help, but if you put a closed loop chip in, it will code......usually the Delcos just die and are worthless very soon in the presence of leaded fuel (heated or not.....)

 

[NC87GN]

I can vouch for the DENSO 02 sensor. We had put straight 112 in at BG and ran about 3 tank fulls before it started acting up. If your tuning to 02's and sick of the Bosch and AC Delco giving out after 1 pass then DENSO is an alternative. They do exceptionally well considering the price but do not last forever. Oh yea, the GN was running closed loop all the time FWIW.

Mike Banas
87GN

 

[ijames]

Originally posted by ijames
And when the heated AC sensor fails, you can get a heated Denso to replace it. I don't know of anyone who has done that yet - all the good reports so far are about the one-wire 234-1001 unit. The 3 wire Denso to replace an AFS109 is 234-4018, and the 4 wire Denso to replace an AFS74 is the 234-3005. Please, if anyone starts using these, give us feedback on price and how long they last.

Someone pointed out to me that I have the numbers of wires reversed: the 109 is the 4 wire sensor and the 74 is the three wire. The part numbers are all correct.

 

[granitestategn]

Thanks Carl!

Thanks for updating your post Carl. Denso 1-wire=234-1001, Denso 3-wire=234-3005, Denso 4-wire=234-4018.

 

[Way2QWK]

Me and a friend have ran about 20 gallons each through the one wire denso sensor with C-16 gas. no problem so far. I parked the Buick for the summer, so I see how it holds up when the weather starts cooling off in the fall. I was able to order them through a Merles auto parts store.

 

[bruce]

Originally posted by azgn
I disagree....why would a heated 02 last longer?

The subtrate in the sensor itself is less likely to let flakes stick to it at the higher temps. There is, to and O2's point of view alot of particles in the exhaust stream, and the hotter the sensor the less likely they are to stick. A heated sensor more or less guarantees a min of a 800dF operating temp, where unheated ones are just a function of the EGT past them. A NTK wideband operates at 1,800dF. And the WB are about the least likely to fail from leaded fuel.

But again, brew makes a difference, IMO.

 

[mark b]

> Honestly can't think of one logical reason any one >would "prefer" to continue buying and using a non-heated >sensor

Also the heated ones don't code when they fail like the non-heated. They kind of slowly "decay". Some people find this annoying because it's a slow thing and you don't realize it as quickly.

IMHO, that's not a reason to *not* buy one