I just installed my new Autometer A/F gauge with a wideband bosch O2 sensor and it works great. It doesn't jump around at all like it did when it was running off a narrowband. I have it in the stock location (just behind the turbo) and it seems like the car is running better. I used to have the dreaded 3800 hesitation and it is not there now. Just thought I would share.

 

are you saying just installing the wideband fixed it?

 

bosch 02 sensor got it next buy list

 

No, sorry if i confused anyone, I was a little inebriated when I wrote that post. I installed a A/F guage using a wideband in the stock location and split the signal to both the gauge and the ECU. Now it seems as though the car runs alot smoother, with less hesitation throughout the rpm range. It seems to drastically changed how the car runs when in that 3800 area. I used to have a bad skip there, but now it stays smooth.

I do have one thing to ask though. After the heated o2 sensor gets to operating temps it shows I am running rich (confirming my suspicions) almost all of the time. Is there anyway to fix this (i.e. with some kind of adjustment)?

 

you forget that these cars have always run pig-rich

my next mod is going to be the AEM wideband system, which runs a Bosch sensor with this nifty gauge that gives the color (green-yellow-red) plus a digital readout all in one gauge that can fit in a regular pod

 

That won't work. Widebands are 0-5V, narrowband sensors are 0-1V. They are not compatible. So your sensor is not a wideband.

Also, the O2 sensor is only used during light load cruising to maintain closed loop. Otherwise it is ignored.

 

OK, but answer this for me please. Why would my car be running noticabley smoother just by swapping the O2 sensor? The one I took out was only a few months old, as I changed it when I got the car.

I was told to run a four wire O2 sensor from a '06 Civic in a previous thread I had started, so that is what I did.

 

No idea. Placebo effect? The ECU ignores the O2 sensor except under light steady throttle and under about ~3500 RPM or so. That is the only time closed loop operation takes place. There's really nothing to debate since this is hard coded into the software and well known.

That may not be a wideband, it just might be a regular heated sensor. Did you connect the heater wires and extra ground?

 

Just my thoughts exactly. When spiltting the O2 senor off to the gauge. The gauge must use its own ground. So by doing this he added an extra ground the the circuity, thus eliminating his 3800 hesistation problem.

 

OMG...

Must not laugh..

 

HUSH! And go drink some ethanol. humor

 

LOL, restraint is sometimes better than lashing!

James

 

Sorry.. I guess it was an easy mistake to make.. Bad Rat.

 

yeah, I hooked up the 4 wires like they should be.

 

a four wire is a standard heated o2 sensor, and the stock location would be way to hot for a wideband anyway

 

Ok, cool. Its not a wideband, but it works great. The one wire it replaced was throwing the A/F gauge all over the place, and I couldn't get a reading of any kind. All I was really concerned with was tuning my idle, and it definately works well enough for that. Thanks for all the help guys.

RR87

 

umm... no
The Bosch LSU 4 wideband oxygen sensor has a response time of less than 100 milliseconds to changes in the air/fuel mixture, and reaches operating temperature of 700 to 800 degree Centigrade (1,400 degree F) within 20 seconds or less using its internal heater. This is nearly twice the operating temperature of a conventional oxygen sensor

 

Hm, better tell that to everyone (including me) who uses a standard wideband to tune an RX-7...

 

That location was to hot for me...at first...because I was running so stinking rich the fuel was burning off in the turbine housing. That over heated the sensor.

JAmes

 

I tune with the force...

 

so where is a good place to put the wide band o2 sensor?

 

well i have a lsu4 in my probe and it says right on the box, dont put it were it reaches more than 1200 F. and the exhaust in the stock location gets hotter than 1400 anyways. it can easily be that on a piston motor