So, I overheated my wideband....
 

Was kinda intersting...we were cruising on the highway in closed loop mode and the EGTs were ranging from 810 - 860.

I was watching the wideband and all the sudden it dipped from 14s to 11s...I was like dude (1987rx7guy) we need to work on these maps again...

But I let off the gas and it took for ever to react to show free air. (fuel cut on decel)

Yeah, turns out my sensor over heated! And that is with it at the end of the RB 3" downpipe.

Freaking rotary heat:)

I am gonna try that poor mans heat sink and get small sheet of brass or copper and put a hole in it...then slip the sensor thru it.

Anybody else over heat their widebands?

James

Ummm.... No....... My LM-1 has yet to overheat..... its on a standard O2 Bung on the RB 2.5 in the stock location....

its at the END of the downpipe..... what angle is it at????? I know it shouldn't be mounted lower than 9 or 3 oclock...

Yeah, it is mounted at the proper posistion...

The angle of the sensor is to protect it from condensation inside the exhaust on first start ups since the sensor is heated.

I really dont think it is from the one time blast of heat...I think the sensor just heat soaks....and my DP is wrapped.

It is crazy though that your sensor has not over heated. Does it have an over heat warning?

James

RXcitng overheated nik's wideband while trying to tune his car after a freash rebuild. It was so rich there were alot of flames and eventualy it just overheated. It was fine the next dat though.

The TechEdge has an overheat warning. 'HEATER PID' or something like that.

Yes, nik's sensor has been used to tune 5 cars from scratch now. I think it is just worn out.

But, it will show lean when it is having problems.

Yeah, I am using an older techedge kit V1.0. On the NTK L1H1 sensor....

Yeah the old V1 is probably like whistling its way down the road unaware that the sensor is like "OH SHIT!!!!!!!!!!!!!!!!!"

I've never overheated mine, mounted at 11 o clock on a 3" downpipe about 4" off the back of the turbo.

TE 2A0

This is why I got the heatsink bung for my LM-1, just to be safe :)

Are you running an EGT?

Did you build that one your self? I have the DIY kit coming to me...

James

I run about 760 at cruise. I've hit about 890 with it on a 95F day and it continued to keep updating just fine, never got the overheat warning on my display or anything.

Can you elaborate as to why the sensor angle can contribute to a sensor overheating?

I think it has a lot to do with the NGK sensor.... Not that its bad... just different from the one that the LM-1 uses.

Dunno.. My brain is fried about O2 sensors after trying to find the right settings for the Bosch 13190 sensor i bought for closed loop mode last week.. Nobody has the output specs.. NOBODY.. so finally I said screw it, put it in set the target at 650 and drove.. seems to work nice!!!

It has nothing to do with it....

The angle of the sensor is to protect it from condensation inside the exhaust on first start ups since the sensor is heated

I'll be road racing this weekend with my V1.5, we shall see. I need to get that L1H1 out of my 7 and into my Supra. Thaen I'll get a differentr WB for the 7, one with a cheaper sensor LOL.

You sure your problem isn't a voltage problem? And not a sensor problem? Maybe a lack of current. It might light up on the display but be not getting enough current. Try using it with no other accessories turned on...meaning light, fan, a/c etc. Or post a thread on their site. I forget what that q and a site is called at the moment. The TechEdge site but not *TechEdge*.

Here: http://autos.groups.yahoo.com/group/oz-diy-wb/

Yeah rather sure....

It only happened after prolonged crusing at over 800C EGTs...

Let it cool down some it would calm down.

It has gotta be a combo of the NTK sensor...along with my DP being wrapped up tighter than a cuban cigar ;)

James

Well, I had been searching for a sheet of copper so that I could make a heatsink for my o2 sensor.

Basicly, drill a hole thru the copper and put the sensor thru it then put the sensor in your exhaust. And the copper will pull the heat away from the sensor.

I had been looking for a sheet of copper for a long while.

I went to the Hobby Lobby today and they sell a 5"X7" sheet that is 0.016" thick for $3.99.

James