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  1. Replies
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    Installed heated O2 sensor, no change in open...

    Installed heated O2 sensor, no change in open loop idle. I think this configuration just doesn’t do closed loop idle. Thanks for everyone who contributed. If I dig into tuning the bin I will reach...
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    I purchased the heated O2 sensor and will be...

    I purchased the heated O2 sensor and will be installing in the next week or so. Will report back on results. Thanks for the info.
    @Brian617 I have not modified the BIN yet, but I expect I will go...
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    Tayto - that is really interesting. Others...

    Tayto - that is really interesting. Others suggested similar, but without the specific experience you had. If I try the heated O2 sensor I will be sure to report back.
    Thanks
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    SOLVED (sort of) I still don't know why the...

    SOLVED (sort of)

    I still don't know why the ECM isn't going into closed loop at idle, but when I increased the physical idle setpoint to 900rpm, I was able to force the ECM into closed loop....
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    Thanks, I think the suggestions are going to make...

    Thanks, I think the suggestions are going to make the difference. Here is what I am planning to do:
    1. Switch cal file to 91 CA emissions config
    2. Replace tstat with 195F
    3. Relocate fan temp...
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    Hey if the OEM configuration had a 195 tstat I...

    Hey if the OEM configuration had a 195 tstat I will do that. I read conflicting info on other sites and what is in the engine now came with the donor vehicle (which was hacked together and not...
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    Ok, with the fan temp sensor unplugged I let the...

    Ok, with the fan temp sensor unplugged I let the CTS get to 215-220 for a few minutes. O2 mV average is around 750. At 189F the average is about the same, maybe slightly higher. It wasn’t a tightly...
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    True - though I can't get that feedback without a...

    True - though I can't get that feedback without a smog test, right? I think we are on the right track, I am going to examine the main spark tables more closely. The fact that they are significantly...
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    Thanks! That is really helpful. I will post O2...

    Thanks! That is really helpful. I will post O2 sensor data for current operation and with higher CTS temp.
    Definitely going to change to ARJX.
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    It looks like ARJX is the right bin: 1991 manual...

    It looks like ARJX is the right bin: 1991 manual for *California Emissions* vehicles. I compared to my current ASDW and there are a number of differences, though I didn’t see anything obvious that...
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    Cat is brand new CARB certified.

    Cat is brand new CARB certified.
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    [QUOTE=1project2many;86776] Do you have report...

    [QUOTE=1project2many;86776]

    Do you have report with HC / CO / CO2 / O2? This report can be helpful.

    16540

    “First advice might be to look at a '91 calibration if engine is being certified as...
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    The AIR system was removed due to failed pump and...

    The AIR system was removed due to failed pump and the emissions system is being certified compliant to 1991 model which eliminated the AIR system. Interestingly, the AIR solenoid valve was defective...
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    Thanks. I am leaning toward manually setting the...

    Thanks. I am leaning toward manually setting the idle above 900rpm for the emissions test. I have confirmed that this forces CL idle due to the "RPM above which open loop idle is forced off" = 825....
  15. Thread: Hi from SoCal

    by SBAdam
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    Hi from SoCal

    Hi everyone
    I have researched many topics on this forum over the past two years, and am just now posting my first questions. I hope to also start answering some questions, since I have pushed...
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    Thanks for the reply. I did replace the O2...

    Thanks for the reply. I did replace the O2 sensor. I think the new sensor is Bosch (which I now know is not the preferred brand. I think the sensor is working, though, since I can force closed loop...
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    7747 Won't Enter Closed Loop At Idle

    I have read hundreds of posts on this forum and it has been really helpful, but I think I have a new problem...

    Vehicle: '85 Toyota FJ60, 4-speed manual
    Engine: 89 C1500 5.7L TBI, all stock...
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