2000 Camry 3.0 XLE Compression test question
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  1. #1
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    2000 Camry 3.0 XLE Compression test question

    Car has approx 320k miles. Started having power and fuel economy problems from several emission problems. Had an evap leak for the longest time but never effected performance or fuel economy. No longer the story. So I am in the fix everything failing now before it is too late or buy another car if the compression is not with in specs. I don’t want to kill the ignition system by doing a compression test improperly. Does anyone know if. Need to unplug something on the electrical to thr ignition system before performing compression tests or am I worrying for no reason and should I just unplug the coil pack from the spark plugs and perform a compression test as usual?
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  2. #2
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    Re: 2000 Camry 3.0 XLE Compression test question

    Why not put the plugs back on the plug wires and ground the plugs on the engine.
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  3. #3
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    Re: 2000 Camry 3.0 XLE Compression test question

    Well i did not think of that. I went ahead and tested the three front cylinders and got 180/190/185.

    These are the 10 codes the mil is spitting out. A couple are the same.

    P0125 Insufficient coolant temperature for closed loop control

    P0330 Knock sensor 2 Circuit ( bank 2 )

    P0441 Evaporative emission system incorrect purge flow

    P0446 Evaporative emission system vent control circuit

    P1155 Air /Fuel sensor heater malfunction Bank 2 sensor 1

    P0440 Evaporative emission system “ original error code “

    P0441 Evaporative Emission system incorrect purge flow

    P0446 Evaporative emission system vent control circuit

    P1150 Air / Fuel sensor circuit bank 2 sensor 1

    P1155 Air / Fuel sensor heater malfunction bank 2 sensor 1

    I changed the alternator with in the last month so some of the stems are still reading inc.

    Example:

    Evap system monitor = inc
    Oxygen sensor monitor = inc
    EGR system monitor = inc
    Last edited by N2 Welding; 08-10-2018 at 12:13 AM.
    '65 Lincoln Idealarc 250 AC/DC
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  4. #4
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    Re: 2000 Camry 3.0 XLE Compression test question

    I think it has a bad O2 sensor. When i view the live data I see that two sensors almost identical are not reading the same values.

    02S12(V). 0.685
    02S11(V) 3.298
    02S21(V). 3.298
    '65 Lincoln Idealarc 250 AC/DC
    ESAB REBEL EMP 215ic
    Thermal Dynamics 60i
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  5. #5
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    Re: 2000 Camry 3.0 XLE Compression test question

    Checked the Front B2S1 A/F Sensor with a meter and I get an open circuit so it's definitely bad. So with a little research I found a stupid deal after doing some cross referencing from Toyota to Rock Auto and finally to Ebay. Toyota wants $262.64 part number 89467 41011 Rock Auto Wants $121.89 For the Denso Cross Referenced part # 2349009



    Now to order an air filter and hope this solves 90% of the problems.
    '65 Lincoln Idealarc 250 AC/DC
    ESAB REBEL EMP 215ic
    Thermal Dynamics 60i
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  6. #6
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    Re: 2000 Camry 3.0 XLE Compression test question

    In case any one is interested I fabricated a bracket to mount the two knock sensors on the outside of the engine block in an effort to see if it will clear up the knock sensor code and fool the computer into running in normal mode again. It's been running with the timing retarded and in fail safe mode which causes very bad fuel economy and possibly fry other expensive parts like cat's and O2 Sensors etc.

    Here is the temporary Knock Sensor trial fix.

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    '65 Lincoln Idealarc 250 AC/DC
    ESAB REBEL EMP 215ic
    Thermal Dynamics 60i
    ESAB Mig Master 250
    Victor Performer O/A
    L-tec PCM-VPi 40A

  7. #7
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    Re: 2000 Camry 3.0 XLE Compression test question

    Sounds like you are on the right track : Hope that fixes it, bad O2 heaters will delay going into closed loop
    If it still eats gas you may want to look into whether the

    P0125 Insufficient coolant temperature for closed loop control continues to come back after clearing

    can you check actual coolant temp after sufficient run time to verify it is getting warm enough to go into closed loop?

    I had a grand am that ran like crap and loaded up /excessive fuel consumption , turned out the coolant sensor was giving incorrect output and telling the computer the engine was still cold.
    the computer adjusted the injector pulse widths to pretty much full rich even though the engine was actually running at normal coolant temps. New coolant (sensor) Not (sender) fixed the problem.

    Obviously a Toyota 3.0 is a different animal but..
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  8. #8
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    Re: 2000 Camry 3.0 XLE Compression test question

    I have not looked at temps yet but when I'm driving it the temp gauge on the dash runs in the middle as it should. I know that does not mean it is running at the correct temperature but is a pretty good indication. If the P0125 comes back I will check temps with a lazer temp gun and check the temp sensor.
    '65 Lincoln Idealarc 250 AC/DC
    ESAB REBEL EMP 215ic
    Thermal Dynamics 60i
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  9. #9
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    Re: 2000 Camry 3.0 XLE Compression test question

    Oh I did not mention I also swapped out the B2S1 Front A/F Ratio Sensor and that code did not come back in the little bit of driving I did.
    '65 Lincoln Idealarc 250 AC/DC
    ESAB REBEL EMP 215ic
    Thermal Dynamics 60i
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  10. #10
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    Re: 2000 Camry 3.0 XLE Compression test question

    I think the temporary knock sensor fix did the trick. I took it for a short 10 mile drive and no check engine light came on. So far so good. However I think the new A/F ratio sensor is either defective or not correct for my ecu. Since i installed it the engine surges when cold during high idle warm up. I think I will spend the $130 for the actual denso sensor that is correct to my car.
    '65 Lincoln Idealarc 250 AC/DC
    ESAB REBEL EMP 215ic
    Thermal Dynamics 60i
    ESAB Mig Master 250
    Victor Performer O/A
    L-tec PCM-VPi 40A

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