VMSpc Engine Monitoring for PC.

Cummins ISB6.7 360hp 800ftlb

Do you have an engine file available for this engine?
if not, what should I use?



How does one go about purchasing the VMCsp 9 pin WiFi?

VMSpc flickers on many gauges while driving

I’ve been using VMSpc version 2.5 build 10 for a number of years with no problems. Last month a number of the gauges started to “flicker” while driving. I’m using a Nextbook tablet running Windows 10 with the latest updates. When we park for any long length of time other than over night or a few days, I disconnect the cable from the maintenance port on our 2006 Fleetwood Discovery (Cat C7 - 330 hp) so the VMSpc box won’t be powered while we’re parked.
Does anyone have this problem? Is there a fix for it?
Please advise.

V4.0.7 - Gear Selected Still Not Working

Hi Art. Tried v4.0.7, and still not seeing the gear selected in the transmission gauge. I even tried installing a second transmission gauge, and it's working exactly like the first. When I run VMSpc without the box connected, I am seeing both question marks. However, when the box is connected, the gear selection question mark will appear for 3-5 seconds, then disappear. I've tried it with both the ignition on and off (my J1939 is always hot), and get the same results both ways. I've also tried with both the ISL 450 and ISL9 450 engine files, and still get the same result on my Jan 2015 dated ISL.

2015 Tiffin Allegro Bus 45LP

Logging data

I am looking at getting the VMSpc. Can someone explain how the logging works. What I would like for it to do is automatically start logging when it is running. How does it name the log files? Does it have a new name for each time it starts logging, does it over write the last file or keep adding to the file.

Also I am buying a MotorHome with a Cummings ILS9 450HP. Is the 9 pin JIB with USB still the best way to go?

New Tablet

Hi Art,

Bought a NuVision 8" Windows 10 Tablet. VMSpc installs ok and runs.
However, when selecting communications and scanning for jib it freezes and becomes non-responsive.
Reinstalled it a few times. No change.

Any ideas?

Adding Sensors

Has anyone tried adding I/O to the J1939 bus? I'd like to add several sensors (pyrometer, fuel pressure, etc) for display within VMSpc. I've found both integrated sensor/broadcasters and I/O controllers. Most appear to be targeting the OEM market. The Murphy XM500 module would cover my needs and at a reasonable cost: http://shopping.murcal.com/Catalog/J1939-CANbus-Input-Output-Modules/XM500-J1939-I-O-Module

One thing that makes me nervous is they all seem to list OFF highway vehicles in their list of applications. Too hazardous to add controllers to the bus of an on highway vehicle?

Any wisdom out there?



Now you can use your Windows-based PC tablet or notebook to monitor your engine - with the VMSpc. VMSpc is an intelligent data translator that links between your USB port and engine diagnostic connector on your rig. Together with the special software, it allows you to read performance and diagnostic information right on your laptop computer. You get complete real-time performance gauges, diagnostics, trip information and graphing system that lets you display any number of parameters at once. You can even store the engine data to a file and load it into a spreadsheet.


  • Check out the VMSpc 'Best-Of' Gallery of Installations.

  • But wait! There's more! VMSpc let's you program audible alarms based on any engine parameter. For example, you can set it to play any MP3 or WAV file (grab a microphone and record your own!) when your road speed reaches a certain point. Have it played once, once a minute, or continuously.

    And you can create a "Tank Minder", which provides a miles-to-empty calculation based on your tank size and fuel economy. VMSpc lets you enter correction factors to compensate for a poorly calibrated engine/ drivetrain. You can even program gauges to read in metric, if you desire.

    Professional engineers use VMSpc to test their vehicle designs. Now you can use the same tools to test your coach.

    Feel free to Download the VMSpc software - it's free. In fact, SilverLeaf Electronics is committed to provide the VMSpc software and all updates absolutely free on our web site. We welcome your input and encourage you to tell us what you'd like to see in future versions of VMSpc.

    System Requirements

    -Windows - Any version except 'RT'
    -Any hardware, tablet, notebook or lugable produced since 1997
    -Available full-size USB-A Port
    ### This is a product for Windows-Based computers aka "PCs" ###
    It is not Apple or Android tablet compatible.
    It may be used via Fusion, VMware on your Apple notebook however.

    VMSpc USB Kit, $395 + freight
    VMSpc JIB (JS501/USB)
    6 ft USB cable (as required)
    1 ft engine diagnostic harness (specify 6 pin or 9 pin)
    CD with software
    Owner's Manual w/ Warranty card


    Refer to the Connector Document to identify what the Diagnostic sockets look like.

    If you would like to try the software for yourself, go to our downloads section and download it free of charge!

    Horsepower and torque readings drop out.

    Have a Cat 3126 330 HP w/ Allison 3000 using 6b version

    As I pull a hill and watch the horsepower and torque readings at 328 HP the readings drop to zero. As soon as the load is reduced and the engine output drops they come back.

    Just downloaded the additional engine files to see if you have an extended engine file for this application.

    A Magic Button: What would it do?

    Hey folks,
    We're exploring an idea called the Magic Button.
    Imagine a gauge which acts like a simple On-Off switch (or something). Then, lets say your jib had some ability to turn something on...and off.

    What would that be? An LED map light comes to mind. But... what else, hmmm?

    And, somehow, if it had this ability to act like a switch, how many of these should there be?

    Your thoughts?


    Apple Compatability

    Any chance this product will be compatable with Apple soon.

    Color of Text

    I have been using V 4.03 on an old XP machine for several years. I just downloaded V 4.0.6b to a Windows 10 tablet. The text inside the gauges is a light brown color and the values are in white. On my older screen they were both black and much easier to read. The manual has only a sentence or two about changing text color that is not of much use to me.


    How can I get odometer data with V4.06

    I reported in the 4.06 feedback topic that I do not get odometer readings with 4.06. I would like a suggestion.

    Running VMSpc with USB JIB. Windows 10. CAT C-10 engine in a 2000 Country Coach.

    Tried all the data bus settings. No luck.

    Any help out there?

    Certain Guage Data stopped displaying

    I have been running vmspc 4.05 for a few months now and recently my transmission gear info gauge stopped displaying what gear i am in. Its just ?? for the last couple of weeks. Yesterday the Oil Pressure stopped updating. I have made sure my malwarebytes & defender scanner has your vmspc folder excluded. All the other gauges appear to be working. Although the mph and water temp changes lag quite a bit more than they did a month ago.

    Is there something I can do to fix this? -Bill

    Adding Guages

    Greetings... I tested v4, but it looks like v3 is still the way to go for me for now (still not getting the gear selected in the transmission gauge for starters). Before firing v3 back up, I ran the PID sniffer in v4 and grabbed some screen shots because of my OCDness. Anyway, I noticed that the PID sniffer in v4 gave me a 412 PID for EGR, which does not come up in v3's PID sniffer. Would I be able to get a working EGR gauge in v3 if I copied all the parameters from the EGR gauge in v4? Thanks in advance.

    Files fail to load - no trip odometer information

    When starting Silverleaf 4.06, messages telling me that a couple of files failed to load display briefly (too briefly to copy down). Could that be why the trip odometer displays zero for miles, mpg, and hours? The simple odometer and fuel meter are displaying correctly, as are rolling and instantaneous mpg. (J1708 6-pin, cummins ISC 350). Computer is an Alpha Switch running Win 10.

    diagnostic error

    Getting a code warning but dont know what it is

    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:40
    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:41
    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:42
    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:42
    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:42
    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:43
    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:48
    ENG SID 251 50 Power Supply Invalid Data 7/28/17 16:48ENG SID 251 50 Power Supply

    Won't Run in MAC/Parallels


    INSTALLED v4.0.5 in our Windows 8.1 1 running in Parallels 10 Version 10.3.0 (29227) in MAC OS Sierra Version 10.12.4, configured & tested OK. Now, when we try to open it, all we get is “Error Reading File”. Sure wish there was a Mac version of the software.

    Wallpapers for backgrounds

    Here are a few wallpapers I played with when setting up my system
    Convert the .jpg to a bmp and use them as wallpaper backgrounds
    Sorry I couldn't upload them as .bmp

    SeeLevel tank monitors

    I have SeeLevel tank monitors.
    Can they be integrated into the VMSpc system?

    v4.0.7 Software Feedback

    With new software comes new opportunities and...maybe some bugs.

    Lets hear about your experiences and how this software is working out.

    --If you would, also let us know which Windows version you're on and which, prior, version of VMSpc you used.



    v4.0.5 Software Feedback

    v4.0.5 was released in late June 2016. As it has significant issues, it's "Experimental only" for now. For First-Time USB installs, use v2.5 ~ v3.1. Leave comments for needed fixes here, first checking the bug-list to see if its already been added. Of course, please add needed detail on PC type, Operating system (XP, Win10...etc) databus (J1708 etc), USB vs WiFi...

    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -


    Reset Mileage

    After 70,115 miles I had to put in a new engine due to improper balance of Coolant by previous owner. I do not want to reset the coach data for total miles, fuel consumed, hours, etc. However I would like to reset those items on the VMSpc. Is this possible? Due to a few miles traveled, I will need to enter these numbers manually in the beginning. Thanks

    4.0.6 interface ideas for you guys

    Here are a few trial interfaces in version 4.0.6

    Picture heirachy

    There should be some kind of hierarchy for the pictures. One time I load and my guages are on top and the next time the picture is covering the guages. There should be the same for stacking pictures too. Also a default wallpaper size so I can create a background that has menu boards to place buttons on

    Change plug?

    I just traded in my older motorhome on a 2010 model. The old one used a 6 pin plug for my VMSpc and the newer one has an 8 pin. Can the plug be swapped out?

    Freightliner dash guages going wild

    Got my updated jib back For the 2017 Cummins 450 with the 500k green twist on plug and all the guages on the Vmspc are working ok. But my problem is every few minutes the dash warning lights go crazy. ABS, Check engine and other lights come on and off.

    Monaco Windsor '99

    So I've got my JIB and now I can't find the diagnositc port for the engine, I can find one for the ABS and the gearbox but not the engine.

    Of course when I initially located the port I didn't get down far enough to see the markings that is was for the ABS only.

    I've checked in the fuse box under the drivers window on the outside and I've checked in the engine bay.

    Did the Cummins 330 not have a diagnostic port?

    Unknown code

    I have received a code that doesn't show up on my list and Cummins can't tell me what it is either. I have a 2012 Tiffin Allegro Bus with an ISL 450. The code is SPN 09951-31

    v4.0.5 Software Bug-list

    FIXES (needed):
    1. Win-10, Defender gives us the boot On install, if program 'sits' idle without being installed, Defender boots it out. Install program is not the problem, Defenders' 'Heuristics' are flagging us as a maybe. (In Work; current work-around is to disconnect from the internet and disable Defender, then re-enable after installation.)

    2. Help menu item, needs a link to FAQ and Website. Link to manual works. Working on a 'boiler plate' which will consistently work on OS XP ~ Win-10)

    3. Win10, WiFi Dropouts after ~45 min. Mouse-trick didn't work. Other method to prevent interruption? (Root-cause is Microsofts' aggressive update method; no Silverleaf-side workaround found. Problem is expected to change with MS "Creators update"--how? TBD...)

    4. Odometer "day one" odometer isn't really day one but is today, instead.

    5. Gauge Flicker J1708 & Serial JIB, 'red' values periodically, ~1/10th sec --Otherwise okay. See #7

    7. Max Gauges: J1708 based data frequently spike. Any little spike (as displayed) also hits the Max with artificially high values. Parsing or Rule situation? (Still hunting for cause)

    8. Color Palate (XP): Palates won't work...

    9. Full Screen (XP): Wonky space at screen bottom.
    (Moved down the list. Very difficult to fix; focusing on the more problematic issues instead.)

    11. Engine Type: Wrong directory opens by default, reverts to My Documents. Next build: drop Additional Engine folder in c:\VMSpc and the balance of stuff in the hierarchical folder (...\VMSpc_4.0.6). This puts the engines in a constant-known location.

    12. When playing .WAV file: Hangs on some Win-10.
    (worked on this but couldn't reproduce it.)

    14. Full Screen: Under Win-10, Tablets: Long background press does not ESC from Full screen.

    15. Trans info: Gear Attained missing on (new) J1939 chassis.

    16. Tank Minder Under Win10 Tablet (without keyboard), cannot select custom color.

    17. Tire Status; Learning Mode This times-out in 20~40 seconds

    18. Tire Status; Presets & positions Tires Populate wrong. Populates with '0' rather than preset. After preset is selected, reverts to '0's again; filling screen with tires.

    19. Tankminder Wrong MPG, when doing a Partial-Fill, wrong MPG is calculated. (Need more data, inconsistent amongst users.)

    20. Maintenance List; displays "0" (mileage) interval (on the list) though it functions correctly while doing so--and while editing. should read 5000 or 10000 or whatever the interval is both during Edit and on the List.

    21. Data Logging; Should--but doesn't continue logging when program is closed and re-opened. "In versions 3.xx the selected data remained selected and was always there without having to always re-select after ever closing of the program."

    22. Anti-Virus and Install; Some AV screw up the process; Its been found that, during install, When certain AV is active, it may filter out files at random. This may be a process of scanning them real-time and them getting...'lost'(?). Can we build in a check-sum; verify that the needed files are present and fixed if not? [SX include wonky Odometer, fuel & mileage calcs and missing gear-attained indicator.]

    23. J1708/J1939 tool; after being set, it may revert back to 'Both' or 'leak(?)' data. After selecting J1939 only, program reverted to 'Both' on its own randomly.

    24. Engine Corrections Prefills Offset and multiplier box with spurious data. Can be zero'd (by entering 0.0 or a needed amount)--but will revert to something spurious when opened again unless unique value is inserted.

    25. Gauges Not Staying Locked Gauges stay Locked while program is running. Once program is exited and restarted, the Gauges are No Longer locked.

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