Hey guys anyone know what size plug I would need to block off the o2 bungs on my headers and midpipe? There all turned off so I dont need them hooks up and that way I can get the wiring mess under there straightened out. Thanks!
o2 sensor plugs???
- Thread starter 98blackstallion
- Start date
twogts4us
15 Year Member
Best thing to do then would be to buy bungs with caps - like this one I found with just a quick google...$8.00 bucks a pop.
http://www.diyautotune.com/catalog/innovate-motorsports-oxygen-sensor-bung-plug-3736-p-71.html
http://www.diyautotune.com/catalog/innovate-motorsports-oxygen-sensor-bung-plug-3736-p-71.html
twogts4us
15 Year Member
blackfang
Founding Member
How did the engine react to you turn off the ECU's ability to read A/F? That is what the front sensor is for. You can turn off the rears w/o any issue.
Just take the rear O2 sensor to a good local hardware store and find a female threaded nut/union and then find the corresponding male plug. A couple of the old fellas at my locally owned hardware store can tell the size and pitch by looking at a bolt.
Its called running in Open Loop and it runs great! Dynospeed shut them off completely due to one of my O2's dieing on the dyno. I havent had any problems so far and I have many thousands of miles on it.
SaleenGT2001
Well-Known Member
its not good to turn off the front o2's. you better hope the tune is dead on and it can somehow adjust itself to temp changes and all the other varibles.
twogts4us
15 Year Member
Hell yeah! I just realized he was also talking about the front O2 sensors...
I'm no expert, but doesn't the ECU expect that info feed from the front O2s to make adjustments to the injectors (among other things)?
While sitting at a traffic light, I watch my A/F gauge dance above and below 14.7, all the while I'm telling myself "there the ECU at work, with input from the front O2s, trying to keep the motor at 14.7 at all times". So, as I said, without this input from the front O2s, how does the ECU adjust? Or does it adjust at all? I'd think the idle would be all over the place...but, as stated, I'm no expert...
SaleenGT2001
Well-Known Member
it is running in open loop and basically ignores a most of the sensors. i cant believe they would allow a car to betunedthat way. i can see if it was a race car but not a street car that sees many different changes
I have a Wideband a/f guage and it always shows point on what its suppose to be so I dont know. I have a very reputable tuner and If he says give it the go ahead then Im for it.
blackfang
Founding Member
To my knowledge, yes it needs that input to correct or even to detect.
To the OP- Ok that is why I was asking because it needs those front sensors. I didn't see a WB on your mod list. Who tuned it?
To the OP- Ok that is why I was asking because it needs those front sensors. I didn't see a WB on your mod list. Who tuned it?
Yeah I dont have the wideband listed I installed it cause I thought about doing nitrous but ended up backing away from that. The car does get bucky and surgy when it gets cold out but my A/f stay good.
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