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Thread: 1991 car with no obd2 port. i want a carpc as guages. how?

  1. #1
    949
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    1991 car with no obd2 port. i want a carpc as guages. how?

    hey guys how are you all doing!

    first off im am totally new to this carpc thing. so i have no idea whats even available out there as computers are also always changing so fast.
    i thought this would be the best place as any to start my learning. so i hope you guys will be gentle.


    i have a fun little 91 honda civic. cheap and simple to mod.

    what i would like to do is get some gauges in there. i have always been interested in installing an LCD screen upfront with the computer hidden in the back somewhere.

    i wanted to monitor as much of the cars engine parameters as possible. the same data that would have come from the ecu on a obd2 port and then some.

    thing such as:
    O2 wideband.
    EGT.
    RPM
    fuel pressure.
    etc.....

    as luck has it, on a 91 there is no obd2 port so i know that i would need to use external sensors. after this, part is where i pretty much i need help.
    how would i link these sensors to a computer?
    what products would allow me to do this?
    Last edited by 949; 08-03-2013 at 11:06 AM.

  2. #2
    FLAC SNOtwistR's Avatar
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    I had the same problem with my RV that is a 1979 Dodge. I just installed real gauges as they all came with sensors. Now you could tap into those sensors and gather data to display on carputer. I would have a look at Phidgets.com, you could use something like the 1018-1019 that would give you 8 analog and 8 digital inputs and 8 digital outputs. A gps chip will allow you to have a speedo on screen even with out any sensors. Driveline is my frontend of choice and has built in support for phidgets and also has a gauge page or just speedo. I am just finishing off my dashboard in my RV today and will post some pics to show you my gauges/carputer screen working later today. Good luck and do lots of reading here, you will get to your goal. SNO

  3. #3
    949
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    nice.

    i actually like an LCD vs the traditional standalone roung pod gauges.

    looking forward to the pics.

  4. #4
    949
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    im on that web site. what am i looking for?

  5. #5
    FLAC SNOtwistR's Avatar
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    Well the 1018 or 1019 will allow you to take the data stream from sensors. It will require some decoding on your part. You could also use some of their sensors for getting data too. It will not be an easy project but it is doable. SNO

  6. #6
    949
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    how do i figure out to decode the data? im up to learn but im not that good.

  7. #7
    FLAC SNOtwistR's Avatar
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    If you used the ready made sensors from phidgets you won't need to do anything, but if you use something different you will need to find voltage readings and adjust to your application. RPM should be easy as it's just an electrical pulse. Speedo you can get from GPS. O2 sensors if you have them you will need to get voltage readings and make calculations based on those numbers. EGT is just a sensor again with voltage readings. Fuel pressure as well is just a sensor you will add. it's funny as most except for O2 is everything I wanted to read. That's why I went with gauges as they all came with the sensors I needed should I decide to add to carputer. But for now I just have the gauges going and and phidgets for the voltage/amperage/temperature/humidity and Driveline showing speed via GPS, TPMS and parking distance. SNO

  8. #8
    949
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    i just found this video.

    http://youtu.be/iqZTLZ0hEJk

  9. #9
    FLAC SNOtwistR's Avatar
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    looks like this is how he did it. http://www.diyautotune.com/tech_arti...80zx_turbo.htm Lot's of work SNO

  10. #10
    Variable Bitrate
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    949, are you familiar with coding, or with electrical compinents?? my car also was from 1992 , and did not had any ECU on it. i used an Arduino to gather info from the sensors, and then wrote a c++ program on the computer, to display the gauges.
    if you do now how to programm, then reading the sensors, CAN take some time to be learned, but afterwards its easy. you will need to find out what type of sensors they are, and then you will have how they work (i can help you more if you give more details).

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