Recent Posts

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31
OBDLink App / Re: PIDs from MSCAN modules
« Last post by Automate on May 27, 2016, 01:16:54 PM »
The app is not setup to do this yet.  I have forwarded this to the app developer.
Any feedback from the developer?

It would be great to be able to create at list of the module headers and whether they are on HSCAN or MSCAN.  Then the app would automatically send STP53 and STP33 as required to send the request on the proper CAN bus.
32
OBDLink App / Re: 2008 Silverado fuel readings way off.
« Last post by TomVG on May 27, 2016, 01:03:16 PM »
Have tried both options, get same result.

Know engine size, 6.6L Duramax, but used default for Volumetric Efficiency. Changed value up and down by 5%, but still no come anywhere near an accurate reading. Where or how do I determine the correct Volumetric Efficiency for my engine?
33
OBDLink App / Re: 2008 Silverado fuel readings way off.
« Last post by STN-Brian on May 27, 2016, 12:48:44 PM »
Under Settings -> Vehicle Editor, make sure the Fuel Calculation Method is set correctly.  If your vehicle does not have a mass airflow sensor you will need to set Engine Size and Volumetric Efficiency.
34
OBDLink App / 2008 Silverado fuel readings way off.
« Last post by TomVG on May 27, 2016, 11:20:18 AM »
I have a 2008  Duramax 6.6L V8 Turbo.

OBDlink is giving me a fuel economy of 32.85 MPG. This is off by a factor of 2.7 of what I am getting. The rest of my readings, Speed, RPM, etc. all seem correct. I suspect I have one of the settings wrong, but have not been able to bring  the MPG reading to anything close to what it should be.
35
Developer Forum / Re: CAN communication
« Last post by STN-Brian on May 27, 2016, 11:16:45 AM »
We do not offer technical support for the IMX6 board.  However, you are welcome to wait and see if anyone else has any experience with that board.
36
OBDwiz/TouchScan / Re: Can't plot all O2 sensors; can't save csv format
« Last post by STN-Brian on May 27, 2016, 11:01:40 AM »
If you selected the check box to record to CSV, then when you close the application the csv file should be available in the My Documents\OBDwiz\Data Logs\ directory.  Was it not there?
37
Please try removing the device from the Bluetooth settings and rebooting.
38
OBDLink MX Bluetooth / Re: OBDLink MX BT Lose Communication With Phone
« Last post by hdn259os1 on May 27, 2016, 10:08:12 AM »
Hi Brian,
Is there other steps I should do to resolve this issue? Thanks
39
General OBD Questions / How does Torque (app for Android) work so fast?
« Last post by mcote on May 27, 2016, 09:03:16 AM »
I'm using Torque and its apparently collecting about 80 data points per second. I know this because I have viewed the CSV file it generates and there are about 80 columns of data, with an additional row each second. 

How does it accomplish this?

I've done a bit of programming with OBD-II dongles and there are serious limitations about how fast you can query data. I know you can do "PID stuffing" which allows you to query up to 6 PIDs in one request. And I know you can do other tricks like include the expected number of messages and turn off spacing and headers, which speeds things up a tiny bit. Even with all these speed tricks, there is no way I can get anywhere close to 80 data points per seecond.

I suspect part of the reason is that Torque calculates some of the data itself, rather than query it. For example, you get the speed in both MPH and KM/H. Obviously Torque only gets one from OBD and calculates the other. But even still, I think Torque is getting OBD data very fast.

Does anyone know how it works, under the hood? Or even care to take a guess?

What I'd really like to know is, does Torque use monitor mode (ATMA) and just listen for the data that it's interested in? I think this would be extremely fast and you wouldnt even have to query any specific data. However I havnt figured out a reliable way to do this, so I'm still stuck querying the specific PIDs that I'm interested in.

Can anyone confirm or deny whether Torque uses ATMA mode to gather data, or does it use PID query mode? Or is it possible to do both?

Thanks,
40
OBDLink LX / Re: 2010 135i Missing EOT and Incorrect Boost Pressure
« Last post by RighteousDevil on May 27, 2016, 06:27:40 AM »
Quote

What "other OBD solutions" are you using?  Different hardware, different software, ...?  We query the ECU for supported PIDs and then use each PID's formula(as defined by the standard) to decode it.

COBB Access Port units will display engine oil temperature readings, they are OBD interface. I don't personally have one on the car but have seen them on other similar models.

I will report back with the PIDs for your questions once I get back to the car.

Thank you for the responses.
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