CA Cat to 49 state
09-04-2010, 08:52 AM
#1
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CA Cat to 49 state
The Cat on my 96 3.4L 4Runner is falling apart and I need to replace it. I can't find a reasonably priced option that's CA legal, so I'm thinking just switch to 49 state since I now live in MI. Only problem, the truck is CA emissions so it has two O2 sensors. Anyone know a way around this?
09-04-2010, 09:01 AM
#2
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the 2 o2 sensors has nothing to do with cali emissions. unless the o2 sensor is screwed directly into the cat then there shouldnt be a problem.
As far as the 2 o2 sensors every vehicle including and after 1999 model years had 2 o2 sensors. 1 before and 1 after the cat. This is called OBDII.
As far as the 2 o2 sensors every vehicle including and after 1999 model years had 2 o2 sensors. 1 before and 1 after the cat. This is called OBDII.
09-04-2010, 07:24 PM
#4
This is interesting as I didn`t really have time to check it out fully my state inspection person told me if your vehicle has the California emission package .
It needs to stay that way to pass Pa emissions the only way I was told to be legal*** is to swap a non California engine.
Now weather this is true or even the law . I just said screw it it needs done replaced the whole exhaust system all Walker and two new denso sensors
It works been about 9 months
It needs to stay that way to pass Pa emissions the only way I was told to be legal*** is to swap a non California engine.
Now weather this is true or even the law . I just said screw it it needs done replaced the whole exhaust system all Walker and two new denso sensors
It works been about 9 months
09-05-2010, 08:57 AM
#5
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This is interesting as I didn`t really have time to check it out fully my state inspection person told me if your vehicle has the California emission package .
It needs to stay that way to pass Pa emissions the only way I was told to be legal*** is to swap a non California engine.
Now weather this is true or even the law . I just said screw it it needs done replaced the whole exhaust system all Walker and two new denso sensors
It works been about 9 months
It needs to stay that way to pass Pa emissions the only way I was told to be legal*** is to swap a non California engine.
Now weather this is true or even the law . I just said screw it it needs done replaced the whole exhaust system all Walker and two new denso sensors
It works been about 9 months
So which kind of sensor did you use? And what year and what engine do you have? I am curious.
BTW, in NJ and I believe any state with 'enhanced emissions testing', the state computer runs the VIN to determine what specs the car has to meet. Mine prints out "Cali. Spec." right on the report and the sticker. This is at a gas station, too, but he connects to the state computer.
As far as the OP, there was no separate Cali. Spec in 1996. Separate Cali. spec. was only '99 and 2000. (The tag may say meets Cali. and Federal spec. but that doesn't mean anything in 1996). The CARB approved replacement parts meet a higher bureaucratic standard but the emissions specs are the same for your year. So you should be fine (and legal, there is no requirement to use CARB approved parts on Cali. cars outside California--even if it were a Cali. car, and it's not. Like xxxtreme said, two sensors is normal from '96 on.)
Last edited by TheDurk; 09-05-2010 at 09:32 AM.
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09-07-2010, 04:02 PM
#9
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That's correct for Cali.'s in '99 and '00 and everything (50-state) thereafter. Your '97 should be 50-state Federal, including California. There was no 'non-Cali' in '97. Or more accurately, there was no 'Cali' in '97.
Last edited by TheDurk; 09-07-2010 at 04:03 PM.
09-07-2010, 04:36 PM
#10
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09-07-2010, 05:43 PM
#11
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What ya do is buy a normal federal emission legal cat converter. Install it and then install a 02 sensor simulator from URD on the rear 02 sensor. Even if the rear sensor is bad the sensor simulator will make the ECU see a perfect voltage waveform from what it thinks is the rear 02 sensor.
This is the route I went with my 4runner when the cat went bad.
FOG
This is the route I went with my 4runner when the cat went bad.
FOG
09-07-2010, 06:01 PM
#12
Registered User
What ya do is buy a normal federal emission legal cat converter. Install it and then install a 02 sensor simulator from URD on the rear 02 sensor. Even if the rear sensor is bad the sensor simulator will make the ECU see a perfect voltage waveform from what it thinks is the rear 02 sensor.
This is the route I went with my 4runner when the cat went bad.
FOG
This is the route I went with my 4runner when the cat went bad.
FOG
URD Rear O2 Sensor Simulators are carefully calibrated to condition the signal from the rear O2 sensor to keep it in the range the ECU is expecting to see.
Note: Be cautious of O2 sims that replace the rear O2 sensor with a falsely generated signal.
Toyota started using a wideband type O2 sensor (air/fuel ratio) in the front position for better engine control. These wideband type sensors need to be recalibrated from time to time by the ECU. The ECU uses the rear sensors for this recalibration process. The ECU cannot properly recalibrate the wideband sensor using a falsely generated signal. This process is explained here, US Patent 5706654.
Note: Be cautious of O2 sims that replace the rear O2 sensor with a falsely generated signal.
Toyota started using a wideband type O2 sensor (air/fuel ratio) in the front position for better engine control. These wideband type sensors need to be recalibrated from time to time by the ECU. The ECU uses the rear sensors for this recalibration process. The ECU cannot properly recalibrate the wideband sensor using a falsely generated signal. This process is explained here, US Patent 5706654.
Last edited by TheDurk; 09-07-2010 at 06:10 PM.
09-07-2010, 06:40 PM
#13
Registered User
As long as the rear sensor isn't dead (heater circuit bad, short, ETC) the URD simulator will work fine. If your worried about it you can replace the rear sensor. My rear sensor is going on 300K miles and almost 7K engine hours and it works fine with the URD simulator.
But yes the simulator doesn't replace the sensor it just modifies the signal. If you have a "weak" O2 sensor the simulator will still make its signal clean and it will still respond to the periodic re-calibration from the ECU.
FOG
But yes the simulator doesn't replace the sensor it just modifies the signal. If you have a "weak" O2 sensor the simulator will still make its signal clean and it will still respond to the periodic re-calibration from the ECU.
FOG
09-07-2010, 07:07 PM
#15
Registered User
As long as the rear sensor isn't dead (heater circuit bad, short, ETC) the URD simulator will work fine. If your worried about it you can replace the rear sensor. My rear sensor is going on 300K miles and almost 7K engine hours and it works fine with the URD simulator.
But yes the simulator doesn't replace the sensor it just modifies the signal. If you have a "weak" O2 sensor the simulator will still make its signal clean and it will still respond to the periodic re-calibration from the ECU.
FOG
But yes the simulator doesn't replace the sensor it just modifies the signal. If you have a "weak" O2 sensor the simulator will still make its signal clean and it will still respond to the periodic re-calibration from the ECU.
FOG
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