Modifying signal from rear O2 sensor
#1
Modifying signal from rear O2 sensor
I'm building a full header-back exhaust and need to trick my second O2 sensor into thinking the cat is still there so I don't throw codes.
I've found a trick that should work, but a few questions:
Do the 1NZ-FE engines use a narrow band rear O2 sensor?
If so, I should be able to solder a 1,000,000 ohm resistor and a 1 micro-farad capacitor across the signal and ground wires to raise the voltage seen by the ECU (as if the exhaust was still passing thru the cat)
I've found a trick that should work, but a few questions:
Do the 1NZ-FE engines use a narrow band rear O2 sensor?
If so, I should be able to solder a 1,000,000 ohm resistor and a 1 micro-farad capacitor across the signal and ground wires to raise the voltage seen by the ECU (as if the exhaust was still passing thru the cat)
#6
On the upstream sensor, to trick the motor into going rich for turbo/super applications.
I'm not going to use a spark-plug chaser, since I'm welding the whole thing I might as well just use some 3/4" black pipe and set the bung back a bit. Any idea on how far? Just enough to pull the tip of the O2 sensor out of the exhaust?
I'm not going to use a spark-plug chaser, since I'm welding the whole thing I might as well just use some 3/4" black pipe and set the bung back a bit. Any idea on how far? Just enough to pull the tip of the O2 sensor out of the exhaust?
#7
Google CEL eliminator images to get an idea. Sometimes you have to dial it in with the length so it's better not to make it a permanent setup.
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tCing_U
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04-09-2013 04:46 PM