Ok,I searched and found out how to copy the signal to the post cat o2 sensors. What can I do for the heat signal?
o2 sensor Eliminator
- Thread starter bigcheif
- Start date
ptschram
Well-known member
https://www.google.com/search?q=j+w...&tbo=u&ei=s5tUUoK0CZaq4AOcrYHgBA&ved=0CCkQsxg
fwiw, my substrates exited the tailpipe a couple years ago and still no cel. i can watch the rear o2's on our scanner and they switch like the regulating oxygen sensors.
fwiw, my substrates exited the tailpipe a couple years ago and still no cel. i can watch the rear o2's on our scanner and they switch like the regulating oxygen sensors.
I seen those, but wanted to do away with the sensor. Just make the ecu think the cat is there.all the write ups put a resistor and cap into the input signal,but don't say anything about the heat signal.I didn't want the sensor hanging while at 600+degrees
You're confusing the O2 heater circuit with and EGT (ExhaustGasTemp sender).
So we are clear, are you suggesting/thinking the O2 heater circuit is reporting back to the ECU the exhaust temperature?
The O2 heater circuit is designed to get the oxygen sensor switching faster, therefore decreasing the time needed to get fuel mixture into closed loop.
So we are clear, are you suggesting/thinking the O2 heater circuit is reporting back to the ECU the exhaust temperature?
The O2 heater circuit is designed to get the oxygen sensor switching faster, therefore decreasing the time needed to get fuel mixture into closed loop.
No,all the write ups do the gray and black wires with a resistor and a cap.nothing is done with the white heater wires,cause mist leave the sensor in the pipe.if I have a"test" pipe made,I don't want to have bungs for the aft sensors.only the fuel/air sensors.
why? its a federal crime.
and the exhaust smells like crap without the cats.
the heater circuit physically heats the sensor to improve cold start sensor performance. no way to get around this other than hanging the sensor under the truck.
and fwiw the eliminator kits are hit and miss, the disco will be more difficult to make work because i think the parameters are pretty strict. they had a slim margin when these trucks passed epa from what I have heard...
and the exhaust smells like crap without the cats.
the heater circuit physically heats the sensor to improve cold start sensor performance. no way to get around this other than hanging the sensor under the truck.
and fwiw the eliminator kits are hit and miss, the disco will be more difficult to make work because i think the parameters are pretty strict. they had a slim margin when these trucks passed epa from what I have heard...
Pull them, plug the holes, ignore the CEL. If you don't like CEL, remove the bulb, get an Ultragauge, set it to ignore the emissions codes. You do have to keep the pre-cat sensors though.
ptschram
Well-known member
The post-cat sensors are there also to provide a fail-safe should the pre-cats fail.
Why oh why do folks wanna butcher their trucks for no benefit?
Why oh why do folks wanna butcher their trucks for no benefit?
There is still benefit if you keep them as trail spares. Then if one fails you can replace it with one that hasn't been sitting in the exhaust being worn out (like the one that failed). The UG will let you know if one fails.
Because they can, and because there's a huge aftermarket of gadgets to spend their money on?
I just drive mine, 10 miles or 500 miles, it's just the same for the D2.
Just done the clutch after we had a 'funny' with the pressure plate.
Peter
Yeah, but YOU don't have post cat sensors. Do you even have cats?
The only reason I would want to do away with the rears sensors, is because if the cat comes apart, it would be nice to just do away with the cat.
Yeah, but YOU don't have post cat sensors. Do you even have cats?
The only reason I would want to do away with the rears sensors, is because if the cat comes apart, it would be nice to just do away with the cat.
Yes, we have cats, there are even a few NAS spec D2's around with four lambda sensors fitted and SAI and all that rubbish.
Fortunately, we can live without the second pair entirely so only need to worry about two ;0
Like you, we cannot eliminate the cats altogether as they are required for emissions, and even though my D2 meets emission testing without them, the law says that if they were originally fitted to the car, they have to be there and working for the annual test.
Our Lambda sensors are pre-cat, we're not looking at anything after the cats at all, which makes life easier.
Peter