SuperRunner
New Member
For my 1UZ swap, I did not include the pre-cat O2 sensor. I have done other swaps that had pre-cat sensors, but they were not required by the ECU to pass the sniffer test.
Here is my problem. I just failed the idle test. CO2 was great, but the hydrocarbons were too high. 550 is what I read, and it should be 220.
It passed just fine on the high idle test.
These tests were NOT done on a dyno, as that is not required in my county.
Does the 1UZ require that pre-cat sensor or should it be able to pass without it?
Here is my problem. I just failed the idle test. CO2 was great, but the hydrocarbons were too high. 550 is what I read, and it should be 220.
It passed just fine on the high idle test.
These tests were NOT done on a dyno, as that is not required in my county.
Does the 1UZ require that pre-cat sensor or should it be able to pass without it?