VMSpc Engine Monitoring for PC.

Oil Temp on Cat C7

I cannot get VMSpc to read Oil Temp. Any suggestions?


Is all OK with Silver Leaf.....just sent and e-mail to Lori and got a bouceback.....

My engine is not in the drop down, which should I select?

Just received my VMSpc in the mail yesterday. Thank you.
I was looking in the advanced tab of the software and noticed that the Maxforce 7 engine is not a selection. I have th 260hp version. Which engine should I be selecting instead?

Stewart Graefner

mileage correction not working

software will not allow me to correct the mileage. I can select the current mileage but it will not allow a correction. The mileage shown was not entered by me and popped up when I first loaded the program.

Removing old data

I have a new coach and want to delete the old data from the old coach. I would appreciate any suggestions.


will it function on a 2000 Harney Renegade with a Cat 3216B??

After Market Can Nodes

I am working on aftermarket Canbus nodes for RV''s that don't have Can .
once I get the info i need to spit data out through WSP hardware, I will be offer some notes per the RV-C spec that you can use.
The nods use the Maple STM32 development board for building and testing.
It has a Can bus built into the board.
The hardware is in a Din Rail Enclosure for mounting.
BTW I have a 1950 Fageol that has 32 Can bus nodes I built.

Cat 3126E diag. codes

Can I clear diagnostic codes stored in the computer with VMSPC?

Running VMSpc on a netbook, 7" screen

trying to run VMSpc at less than full screen so I can run Streets & Trips at the same time.
VMSpc ALWAYS opens in full screen and clicking on the reduce button does nothing. Also tried grabbing the screen border and dragging, still no change.
I'm using the latest release of VMSpc and Windows XP. Other programs can be run partial screen.

pig tail connector

6 pin connector does it work on cat and cummins? thanks

Battery Voltage Fluctuates

My voltage is constantly changing. It goes from 13.4 to 13.6 to 13.8 to 14 volts in an endless cycle.

Is it just a timing issue and would there be a way to adjust the sense speed?

Battery Voltage Parm file bug

On my VMSpc the unit for battery volts (V) disappears. I have determined that it is probably a bug. What happens is that the unit for the first gauge in the parameter file, which is usually Battery volts, dissappears. As a work-around I created a dummy gauge called Amps. Since it appears before Battery I can now enter a V for units and it stays put. I've reported this to Mark.

Default metric workspace

In the VMSpc instructions there is a mention that the display can be modified to show information in metric. I started switching some of the parameters and it appears that the only way to do this is one parameter at a time. Does anyone have a default workspace (in metric) file that they would be willing to share in order to save me and other users the tedious work? I'm wondering if SilverLeaf could create and post such a file on their downloads page or include it in their defaults settings distributed with the application.

Strange numbers in odometer window.

I am a brand new user of VMSpc and there is definitely a possibility that this is a user problem. When I connected my VMSpc to our RV, I get readings of 4,278,693.0 miles, 232.0 gallons, 45:24 time, 94,244.3 mph, and 18,442.6 mpg in the odometer window. The RV has roughly 44,000 miles on it so these numbers are kind of off the wall. The odometer shows completely different numbers. I triple checked our engine settings to being Cummins 8.3 ISC 350. Any suggestions?

VMSpc Version 2.5 Build 10.... Released!!

Some people using the USB JIB ( JS-501 ), have experienced a Program Crash when accessing the "USB Advanced JIB Properties" Dialog Box.

We have been able to Replicate this issue, and we have resolved the problem with Version 2.5 Build 10.

Also, included in Version 2.5 Build 10, is support for the "Maxxforce 10" by International®. There are two parts to this support, the Engine Parameter File, and the addition of support for PID 158, "Battery Potential (Voltage)—Switched". The more common PID 168, "Battery Potential (Voltage)" does not appear to be supported.

If you have a Maxxforce 10, you will need to use the "PID Sniffer" to scan for all the provided PIDs, and ADD PID 158 to the VMSpc Parameters. You can use the Formats for PID 168 for your "template". This would be in addition to selecting the Maxxforce 10 Engine Parameter file.

The above PIDs are the domain of the SAE, their mention is for clarification purposes only.

Cycling milage within Trip meter

For the past few fuel fill-ups I have noticed the mileage reading in all trip meters continually cycles between 0.0 and 4.9 mi when I initially reset the trips and fuel minder at fill-up. This "difference" continues to display, cycling from the true mileage to a value that is 4.9mi higher as the millage increases. Why and where is this phantom 4.9mi coming from and how can I get rid of it? Consequently the MPG reading within the trip meter cycles between values at the same time.

Cruise set speed and Cruise status indications

Having fun with my VMSpc, except for the cruise indicator gages. Cruise status will indicate "0" when cruise is switched off, "1" when it is on and "129" or "133" when cruise is engaged. Anyway to get that to read "off", "on", and "engaged"?

Cruise set speed reads either "0", or the actual set speed, but there is no consistency on that indication and when it does indicate the speed, it is only momentary, then returns to "0", even though the cruise is engaged and working.

Any suggestions on how to correct this issue would be appreciated.


Reflash of JIB cured trans gauge dropout, but now turbo gauge drops out.

I had my USB JIB reflashed while I was at the FMCA rally in Albany last month. My trans gauge which was dropping out all the time was fixed by the flash. But now my Turbo gauge is dropping out about %50 of the time.

Any guesses on the fix for this one?

Thanks, Marty

Fuel Minder

I have had the VMSpc for a couple of years but only recently used it consistently on a cross country trip. I calculate fuel mileage. On this trip I compared the Fuel Minder (Fuel Used and Fuel Remaining) at each fill up. Consistently the fuel added is higher than the fuel minder reading. Example: Fuel Minder reported I had used 47 gallons but I pumped 57 gallons) This also makes the MPG appear higher on the VMSpc than my calculated.
Is there a parameter I can play with to adjust so I can get the calculated readings and the VMSpc closer.

Del Perry

Android tablet

Can I run VMspc on an Android Tablet?

Upgrade from build 2 to build 4

I just saw that the current build for VMSpc is build 4 rather than the build 2 I have installed.

I have an older serial jib using the prolific driver for the usb connection to my W7 64 bit pc.

I am not having any issues with my current installation and would like to know what advantages does b4 have over b2 and should I upgrade or stay with what works?

Bernie Dobrin
2002 Travel Supreme
Cummins ISL 400

VMSpc serial to USB JIB upgrade

Can I still trade in my serial Jib and get a USB jib?
Will the USB Jib work with my current 6 pin jib power cable?
If yes please send me information at searay269@yahoo.com
Thanks !!!

Windows 7 Driver for VMSpc

Can you send me the driver needed for Windows 7?
I have the USB to Serial adapter purchased from SilverLeaf. Been using the windows XP driver on an older laptop computer. Purchased a new laptop that uses Windows 7. Using the latest version of the VMSpc 25b4.
Can not find the driver on-line. The Prologic site will not return a driver for the adapter.

Thanks William Fuller
E-mail address searay269@yahoo.com

VMSpec_USB software updates

I am running the VMSpc software on an ASPIRE One netbook with the v2.5b4 version installed. Is the software titled VMSpec_USB_2011a.zip intended to be an update for this software or for some other application or hardware?

Engine file for EPA 2010 450 HP Cummins ISL engine

Recently purchased a 2010 Allegro Bus with the new DEF engine. The only engine file I find in the software is the one for 425 HP Cummins ISL.
Also When I use the PID sniffer I ONLY have about a dozen PIDs showing, I think there should be many more what is happening or what am I doing wrong?
This is my fourth coach using VMSpc, pretty sure it is not a hardware problem.
The only other difference, it is on a Tiffin powerglide chassis with the Aticia electrical system.

VMSpc on netbook running Windows CE

I'm new to this forum: Please forgive any errors in procedures.

I looked for this subject on previous discussions but failed to find it.

I have the VMSpc operating on an XP system without problems (although I've had no opportunity to road test the program) and I've temporarily set it up on an Windows 7 system. Looking to relocate to monitor to the left of the dash (of a Winny Journey) if the program will run on a netbook, I'd like to know if anyone has successfully run this program on a netbook with a Windows CE operating system.

Thanks for any experience or insights on this idea. I don't want to buy a netbook if its not going to work.

JT Kirby

Trip Odometer not working

I recently traded RVs from an 02 coach with a Cummins ISC 350 to an 04 coach with a Cummins ISL 400.

My VMSpc data display items all worked except one - the Trip Odometer. It does nothing.

Any ideas on how to solve this?

Fred W
Polk City, FL

VMSpc for toad

I love my VMSpc that I use along with Delorme. Unfortunately, when I move the laptop computer to the pickup, all I have is mapping.
What would it take to make a VMSpc version and jib that would plug into the connectors on newer cars and pickups so you could open a second (different version) of VMSpc and get the information that the car/truck supplies.
The trip odometers, fuel consumption gauges, etc. would be nice to have for touring in the toad.

Odometer fuel consumption

I have always noticed that the update frequency of the Odometer fuel consumed reading is very erratic. Sometimes it will update in only a matter of minutes, other times it may be as long as an hour or longer. There never seems to be any logic as to the update frequency. Is this a normal behavior, should it be updating real time, or is there a logical explanation why the frequency varies so much?

07 Country Coach Inspire

Cannot get prolific drivers to work in old installation.

My VMSpc had been working fine on my W7 laptop. I hadn't used it in a while and when I tried starting up today, I wasn't getting any communications. I had plugged the USB/serial cable into a different USB port which installed the drivers on Port 10. Since VMSpc was looking for port 3, I tried changing the driver to port 3 and went downhill from there. I've uninstalled and reinstalled the driver, downloaded most current version from the internet, but I keep getting an error 31, unable to install driver. Can you help?

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