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Thread: Pb-sensor replacement

  1. #11
    Senior Member turbo_man's Avatar
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    I think you're right about that.

    I always suspected that mechanical fatigue inside the sensor had something to do with it. It doesn't seem to show up at all with static or near static tests.

    I've never had another sensor to test with until now. I hope sensor technology has progressed a bit in 30 years.

    I'll let you know how it works out....
    '82 CX-500 Turbo
    '94 VT-600CD (sold)
    '82 CX-500 Turbo #000541(sold)
    '80 GL-1100 (sold)
    '79 CX-500 Deluxe (sold)

  2. #12
    Senior Member abecedarian's Avatar
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    Quote Originally Posted by turboExperience View Post
    ...

    I was well into a design for a signal conditioner to use the Freescale MXP4250 sensor ....


    I would suggest not giving up on that endeavor since there's no guarantee replacements for other sensors can be found.



    A microcontroller and generic sensor operating in the desired range with the MC outputting PWM into a voltage converter referencing ECU ground and voltage should work.

    You could use the PWM signal to switch a transistor or mosfet to achieve voltages greater than the 3V3 or 5V0 most microcontrollers operate at.
    1982 CX500TC- JH2PC0300CM000120
    You can lead the horticulture but you can't make her think.

  3. #13
    Senior Member turbo_man's Avatar
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    I'm leaning toward analog, although a programmable digital sensor has it's sexy side.



    But, the Suzuki sensor fixed my problem! I'm so happy, it brings a tear to my eye...





    This turbo has been running like krap since I bought it (the first time) in 1993! I replaced the Pb sensor then with a "new" one, which was still available then, and apparently it was bad, too. I sold it because I got tired of trying to find the problem , and when I bought it back last year, I started in again.



    I mounted the sensor on the R bolt of the original sensor, and it fits just fine.



    Thanks be to Leo Knijnenburg and Ko Maljaars.

    I am forever in your debt.



    I'm going boosting tomorrow, even if it's too cold!
    '82 CX-500 Turbo
    '94 VT-600CD (sold)
    '82 CX-500 Turbo #000541(sold)
    '80 GL-1100 (sold)
    '79 CX-500 Deluxe (sold)

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  5. #14
    Senior Member abecedarian's Avatar
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    Nice to hear it works!
    1982 CX500TC- JH2PC0300CM000120
    You can lead the horticulture but you can't make her think.

  6. #15
    Senior Member dutchturbo's Avatar
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    Quote Originally Posted by turboExperience View Post
    I'm leaning toward analog, although a programmable digital sensor has it's sexy side.



    But, the Suzuki sensor fixed my problem! I'm so happy, it brings a tear to my eye...





    This turbo has been running like krap since I bought it (the first time) in 1993! I replaced the Pb sensor then with a "new" one, which was still available then, and apparently it was bad, too. I sold it because I got tired of trying to find the problem , and when I bought it back last year, I started in again.



    I mounted the sensor on the R bolt of the original sensor, and it fits just fine.



    Thanks be to Leo Knijnenburg and Ko Maljaars.

    I am forever in your debt.



    I'm going boosting tomorrow, even if it's too cold!
    I'm also very happy it works well . Now you can really enjoy your turbo. Mission accomplished.
    83 CX650T 2x

  7. #16
    Senior Member abecedarian's Avatar
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    So, where's the video of it running balls-out?
    1982 CX500TC- JH2PC0300CM000120
    You can lead the horticulture but you can't make her think.

  8. #17
    Senior Member turbo_man's Avatar
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    Funny you should mention video...

    My son just bought a GoPro and a package of helmet mounts....



    It didn't help the problem when I swapped Pb and P1, so that means P1 has less-than-stellar performance as well. I think I'll replace it, too, even though it's under far less stress than Pb.



    Stay tuned for further reports....
    '82 CX-500 Turbo
    '94 VT-600CD (sold)
    '82 CX-500 Turbo #000541(sold)
    '80 GL-1100 (sold)
    '79 CX-500 Deluxe (sold)

  9. #18
    Senior Member turbo_man's Avatar
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    Had my maiden voyage last evening after the new Suzuki MAP sensor.

    I can tell you, if your turbo has ANY drivability issues like coughing, hiccups, hesitation, backfire, poor throttle response, etc., at light loads....

    CHANGE THE MAP (Pb) SENSOR!

    I don't remember even the turbo I bought new running this well. It's absolutely smooth, hot or cold.

    Probably should change it as a matter of course. It may improve gas mileage or something you don't even know you have.

    What an awesome discovery!

    I ordered another one off ebay yesterday to do some testing on the old Pb sensor and then to replace P1.

    Now to test the wastegate actuator. I want all the boost I deserve.

    It's gonna be a good summer!



    Thanks again, Dutchturbo team!
    '82 CX-500 Turbo
    '94 VT-600CD (sold)
    '82 CX-500 Turbo #000541(sold)
    '80 GL-1100 (sold)
    '79 CX-500 Deluxe (sold)

  10. #19
    Member mikebamy's Avatar
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    Quote Originally Posted by turboExperience View Post
    Had my maiden voyage last evening after the new Suzuki MAP sensor.

    I can tell you, if your turbo has ANY drivability issues like coughing, hiccups, hesitation, backfire, poor throttle response, etc., at light loads....

    CHANGE THE MAP (Pb) SENSOR!

    I don't remember even the turbo I bought new running this well. It's absolutely smooth, hot or cold.

    Probably should change it as a matter of course. It may improve gas mileage or something you don't even know you have.

    What an awesome discovery!

    I ordered another one off ebay yesterday to do some testing on the old Pb sensor and then to replace P1.

    Now to test the wastegate actuator. I want all the boost I deserve.

    It's gonna be a good summer!



    Thanks again, Dutchturbo team!

  11. #20
    Senior Member turbo_man's Avatar
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    OMG! It runs Soooooooooooooooooooooooooo good! So smooth, so creamy....



    Sorry, I'm ok now....
    Catman likes this.
    '82 CX-500 Turbo
    '94 VT-600CD (sold)
    '82 CX-500 Turbo #000541(sold)
    '80 GL-1100 (sold)
    '79 CX-500 Deluxe (sold)

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