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Thread: Anyone dealt with a 3.3 bar Duramax MAP?

  1. #1
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    Anyone dealt with a 3.3 bar Duramax MAP?

    Thinking about buying a 3.3 bar duramax sensor. Says it's plug and play. Anyone dealt with one? Is it a bear as far as tuning?
    1998 Pontiac Trans Am - 1000+ rwhp street car

  2. #2
    Picked up one going to try it out.
    " '01 SS "

  3. #3
    Senior Tuner DSteck's Avatar
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    Linear value is 333.33 and offset is 33.33

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  4. #4
    Quote Originally Posted by DSteck View Post
    Linear value is 333.33 and offset is 33.33
    Thanks, will give it a try and see how it goes.
    " '01 SS "

  5. #5
    Quote Originally Posted by DSteck View Post
    Linear value is 333.33 and offset is 33.33
    Take a look at the screen shot. I input those values in my map calibration and this is what I got:
    My koeo map is 35 on the histogram
    the absolute pressure reading on the table is 105
    and the map on the guage chart shows 35.
    Which value is the right one if any?
    The table value seems to be close but the histogram and the electronic guage is what I'm concerned about.
    " '01 SS "

  6. #6
    Correction, I had to delete the sae pid from my config file, now it shows 0 kpa koeo and its reading 4.86 volts. This shoud be way less for 3 bar sensor is this not correct?
    " '01 SS "

  7. #7
    Senior Tuner DSteck's Avatar
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    KOEO never shows up right for me in LS1 stuff. Start the engine and see what happens.

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  8. #8
    Quote Originally Posted by DSteck View Post
    KOEO never shows up right for me in LS1 stuff. Start the engine and see what happens.
    Started it up and it was right on 100kpa, 333.33/33.33 was way off for me had to use 100/10.33.
    " '01 SS "

  9. #9
    Senior Tuner DSteck's Avatar
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    You must not be using the right Duramax sensor then.

    DSX Tuning - Authorized HP Tuners Dealer
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  10. #10
    Quote Originally Posted by DSteck View Post
    You must not be using the right Duramax sensor then.
    Not sure what it is but it registered all the way up 320kpa on the 333.33 calibration at idle, and then 180kpa calibrated at 200. I thought it was bad and started to pulling it out but then I thought maybe I should set it at 100 and see what happens. Well it worked, it idles perfect and registered 100kpa as soon as I turned the key and idles at 65-75kpa range. I'll have to take it out for a spin and see what does under boost, but otherwise it's working fine for now. I thought maybe it was a one bar sensor, but I guess I won't find out until I test it.
    Last edited by SuperC1; 02-06-2012 at 11:26 PM.
    " '01 SS "

  11. #11
    Senior Tuner DSteck's Avatar
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    You are using a one bar sensor.

    This is the Duramax sensor:

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  12. #12
    Quote Originally Posted by DSteck View Post
    You are using a one bar sensor.

    This is the Duramax sensor:
    Yep thats what I'm thinking, mines doesn't have an original gm label on it like that one, although it's made like it. I think I may have one of those chinese versions or someone may have pulled a switch and put an old stock one back in the box . I put a new one on order and we'll see what it does when it gets here.
    " '01 SS "

  13. #13
    Senior Tuner 5_Liter_Eater's Avatar
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    I have not heard good things about the Chinese knock off Duramax MAP sensors.
    Bill Winters

    Former owner/builder/tuner of the FarmVette
    Out of the LSx tuning game

  14. #14
    I stopped by the dealership today and picked up a new sensor pn 12623671, looks like this one replaced the one in the picture, and this one is a genuine AC Delco part. Once I get it installed there should be some big differences in the calibration numbers.
    " '01 SS "

  15. #15
    Update, I got the new sensor in and sure enough it reads 1v with the koeo, and cylinder airmass is at 1.0, it looks like we solved this mystery.
    My conclusion, always buy genuine gm electronic components whenever possible, especially if they are critical, you can save yourself some time and some money. I wasted hours chasing the issue and even more time pulling the intake, and more money by having to buy the sensor again (the right sensor this time). Either way I'm glad we got the problem solved, now I can finish my tuning. On to the next issue.
    " '01 SS "

  16. #16
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    Just installed a 3.3 duramax sensor , used the 333.33 and 3.33 and it moves and idles were it should, but i get an ses stating low voltage .. this normal ?

  17. #17
    Quote Originally Posted by MStefak View Post
    Just installed a 3.3 duramax sensor , used the 333.33 and 3.33 and it moves and idles were it should, but i get an ses stating low voltage .. this normal ?
    No, I used the 3.3 sensor and it works just fine. no SES or CELs.
    " '01 SS "

  18. #18
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    guess the sensor is fubar . just my luck.

  19. #19
    Senior Tuner DSteck's Avatar
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    Does the factory MAP sensor plug look like the left or right?


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  20. #20
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    my stock one looks like the one on the right and so does the duramax one i have