VMSpc Engine Monitoring for PC.

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?

Fuel minder on 02 Knight ISC

Marco, my fuel minder stoped giving me mpg and distance to empty intermitantly about 4 months and 3.5k miles ago. I still get gallons remaining. I have deleted the guage and reinstalled one, that worked for a little while after fill up, but driving down the road the mpg and distance would stop. Now I have only gallons remaining showing, and can't get the mpg and distance to display. I checked the total miles and gallons and they are both correct, total distance only off only 77 miles after 49K.
Had a fuel line leaking on the injector system last Christmas that was repaired but fuel minder was working after the repair. Thanks for the help, RNM

Invalid diagnostic codes

The following results are the same on either W7 or XP. Currently using XP on a 10 inch notebook.

The invalid codes are 48,49,50,56,57,67,69,256,322.

I have an ISB275 5.9L. These codes do not correspond to the codes listed for cummins.

So my question is.

Is there some way I can build an exclusion file in the software to ignore these codes. This will make diagnostics a little cleaner. No apparrent problems with the engine.

Ipad and VMSPC

Love my VMSPC running on a netbook. Wondering if there any plans to have VMSPC running on an IPAD...would sure make a sweet monitor.


No Transmission Data on 6 pin plug Monaco Knight 2005 Allison 3000MH

Further Update Found Monaco plug not connected between the Engine and Allison. Located in the forward bay near the Allison module and transmission diagnostic port. Now working okay.

UPDATE The Allison tech mentioned below used a port outside in the forward bay when I was not looking! It is a 12 pin, J1939 buss. Now waiting for Oregon to wake up so I can call and see if they can make a cable to hook up here.

2005 Monaco Knight Cummins ISC 330 with 6 Pin plug on the drivers side dash can Not see Allison 3000MH Data. Mark, here at Silver Leaf has me looking for another plug but I can not find one. The Voltage and Engine data seem to be working but No Transmission Data. Anyone with my unit have VMSpc working? Thank you

Count-Down Odometer

Is there any way to create a count-down odometer so I can preload a mileage value and the gauge will show miles left to the destination?

PacBrake Activated Indication - Cummins ISC / Allison 3000MH

Is there a way to indicate that the PacBrake has activated? Not that it is selected ON but that the signal has been sent to the transmission.

Economy Mode Indicator for the Allison 3000

Is there a way to indicate the Economy Mode status?

reduced window size on program start

I was having problems communicating with the engine jib. So I started Windows 7 in the safe mode and while in safe mode I started VMSpc. The program started OK but since the configuration I using was larger (in vertical dimensions) only about 60 percent of the VMSpc window screen was displayed which was OK in safe mode. The problem now is that in normal mode the VMSpc screen always starts in the reduced window area. I can adjust the size back to the full size I want, save the configuration and shut down as normal, but when I restart the program the reduced window always comes back. I'm not having much luck, I know its some thing dumb but I don,t have any more ideas, can you help?

Gauges dropping out with new JIB

I traded up to the new USB JIB when I bought my new MH with the new Allison transmission. Mostly it is working well with a few odd occurrences. The tranny temp gauge will drop to zero kind of like the torque gauge does when you take your foot off of the accelerator. A few other gauges will do this as well, then pop back in for unknown reason. Any guesses? Do I need to delete the specific gauges and recreate them? I am running the program on a Vista platform.

It is because I am using the same files that I created with the serial port adapter?


Instantaneous MPG output

Playing around with the VMSpc today.
If I run 60-62 MPH my VMSpc shows a MPG of 10-11 (rounding off the actual figures) BUT if I up the speed to 65 the reading goes up to 12-14. Is the reading I'm seeing accurate and it's more efficient to run the higher speed (against logic) or is the readout being fooled by something?
I have an ISC 350 with the Banks Power Pack in a Newmar Dutch Star.

Has Anyone Used The VMSpcSharedMemory Structure In Vista/Win7??

I have written a C# app in Win XP that uses the shared memory structure, "VMSpcSharedMemory" which works fine.
I'm having problems accessing "VMSpcSharedMemory" in
Win7. Will it work there?
Thanks for any help/ideas.

Tom Fisher

Manifold Temp on Cummins 5.9 ISB & Eng Prot light

Recently I connected my laptop to the info port using VMSpc and

While on a trip in the Rockies , I was able to fine tune and control the
temperatures while climbing major passes.The monitoring was really great to

The only problem I experienced was on descents , when the exhaust brake would
kick in , the manifold temp would shoot up rapidly (visible only on the
Silverleaf monitor) . An engine prot light would then come on on the Dash panel.
As my speed would lower and the Exhaust brake would kick out , the manifold temp
would drop and the light would go out.

The maximum temperature I saw for the manifold was 275 degrees , but that was
just momentary. It would quickly drop to under 150 after the Ex brake kicked

The other temperatures were fine and well within normal limits.

What is the maximum permisable temperature for the manifold intake ?

Could there be another reason the eng prot light came on that I am not aware of.
It seemed totally related to the Manifold temp.

Thanks for your input !


Way to adjust tire revolutions per mile?

Recently installed new tires. Just noticed that mph on VMSpc does not precisely match my GPS.

GPS showed 64mph, VMSpc showed 62mph, and stock speedometer for coach showed 66mph.

Tires are a different size than previous, but almost a perfect match for revolutions per mile. I went from 9R22.5 to 265/75R22.5. Revs per mil went from 543 to 540.

Is there some place in the program that I can tweak the tire revs/mile to get a better match between VMSpc and GPS?

If there is a method - could you give me the step-by-step Adjusting for Dummies version?


Will an older JIB work with the Cummins 6.7 engine?

I have a JIB that I have been using successfully since about Oct of 06'. Now I am trading the MH up and getting a 2010 Cummins 6.7 engine. Will I need to trade up the JIB to work with the new motor? What about the Allison, what is the cutoff date for the newer Allison World transmissions?


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