One last question.. (O2 sesnor life vs leaded race fuel)

[myclone]

One last question for ppl who have BTDT...

Whats the average "life span" of a new (or non worn out) O2 sensor when used with race gas? Gonna be using %100 CAM2 108oct (purple) or 114oct (if I can find it).

I tried some cam2 (108 oct) a long time ago and had an O2 die on me in less than 4 passes. It was in need of replacing anyway IMO since I had no clue how many miles were on it to begin with.

I want to run some race gas but dont wanna have to replace the O2 on every pass. You guys got an "average" of how long a O2 can live while getting pounded by leaded race gas??

Oh, cat is gu.... umm.... the guts "just fell out one day" so contaminating the cat is not an issue..

Thanks again for the info ppl... I promise to leave you alone for the rest of the weekend.. :grin:

 

[Buster]

If you run leaded gas at the track and track only you'll be ok for a while. I used to run 110 octane year round and went thru 3-4 sensors last year. It's sort of a craps shoot though, my first 02 sensor lasted 5-6 months and others died within a month.

 

[typhoonzz]

Ok, So right now I'm basically running straight 110 in my truck. If/when the 02 sensor does go out, what happens?
Does the truck just die, start running like crap, what?
Thanks!

 

[Buster]

Your 02 will get lazy, its easy to spot with a scan tool. If it's healthy your 02 voltage will bounce around wildly (4MVS to 800MVS) at cruise/idle, when they start to die they tend to stay around 500MVS plus or minus a couple hundred.

Mark larson

 

[ttdolson]

....

 

[myclone]

Thanks ppl... I think I'll pick up a couple O2s at the stealership and take em with me to Mooresville, NC "just in case"...

Now, if I could just find CAM2 114octane local... Dammit, everyones got 108 but no 114...

Might just hafta run some of that world famous Franklin County 'shine instead...

 

[Tooky]

A Turbo Buick acquaintance of mine says when his O2 sensors get fouled with leaded race fuel, he just shoots them up with carb cleaner and they perk right back up. FACT or FICTION?

 

[warmpancakes]

Myclone, Most of the gm dealers warranty the o2 sensors for life so I just bought 2 and swap them monthly Ken

 

[typhoonzz]

Ok, So the sensor gets lazy and doesn't work.
Then what? Does the truck run like crap, not run at all? What? Lately I'm running diacom everytime I start the truck up and from what I can tell, the sensor is working fine. But what is its function? Does it do anything imperative? No check engine lights or trouble codes as of right now.
Thanks again!

 

[leroy]

Typhoonzz whoever you are, :wink:

You don't need an O2 sensor. It's only there to make fuel trim adjustments to keep the cat happy. Do you have a cat?

I say run open loop, disable the malfunction flag and stick a plug in that O2 sensor bunghole. Better yet, stick a wideband in there.

Later,
Jim

 

[0966Sy]

Leroy'

So are you saying it is possible to bypass the O2 sensor on a truck with no cat and a AFPR with no loss of good driability and performance?

 

[Tooky]

On 2001-12-03 21:39, Erik wrote:
Leroy'

So are you saying it is possible to bypass the O2 sensor on a truck with no cat and a AFPR with no loss of good driability and performance?

Yes Leroy, do tell..

 

[typhoonzz]

He works today
Have to wait till tomorrow. He is going to program my truck that way so I'll let you know if I can tell a difference.

 

[leroy]

There's not a lot to tell really.

KO2ATIME is the O2 sensor not ready timer parameter. It can be set to zero to force continuous open loop.

There are some advantages to this. As I mentioned earlier, the O2 sensor is there to maintain a 14.7 a/f ratio, keeping the catalytic converter working best. There are some exceptions, notably PE mode and while warming up. You could also argue that the O2 sensor can provide feedback to make fuel trim adjustments to compensate for engine wear. But, who says 14.7 is the best a/f ratio for idle, cruising, economy, or power? Removing the O2 sensor from the loop, lets one experiment with those things to find what works best with each truck.

The usual caveats apply...use at your own risk, off-road only, etc.

Thanks to Brian Green for explaining this to me quite awhile back. I hope I didn't butcher the explanation too much.

Jim

 

[Buster]

On 2001-12-05 09:03, leroy wrote:
There's not a lot to tell really.

KO2ATIME is the O2 sensor not ready timer parameter. It can be set to zero to force continuous open loop.

For the guys that don't burn chips, you can just unplug the sensor, that'll put you in open loop as well.

<font size=-1>[ This Message was edited by: Super Serious on 2001-12-05 16:03 ]</font>