Most sensor values not changing in TS or MT

[ThrockmortonWhump]

Hi guys,
New Megasquirt user here trying to set up my MS2 3.0 with a JimStim while wiring my car. I bought both assembled. I'm converting a '92 Corvette LT1 to MS2 with EDIS ignition.
The Stim appeared to work correctly (injectors cycling) when I connected it to the controller without connecting to my laptop. I'll admit I was sloppy when connecting to MT for the first time, I didn't correct the mismatch in the ini files between the controller and the software correctly. I tried again after, with TS and new projects, but now the Stim is not showing the injectors at any time, connected or not. Most of the sensor inputs will not change in either TS or MT.
CLT and MAT show 0 deg. F, but won't change with their Stim pot.
EGO shows about 11.5, again won't change with pot.
TPS was showing about .1V - .4V and I was able to calibrate it with these values, it works correctly.
No RPM showing
MT realtime display shows battery voltage as 0 and MT says voltage is too low to burn correctly
I have (carefully) re-loaded the MS2-Extra firmware twice, and this appears to be working correctly. (is the correct code 2.1.0q?)
Have I corrupted the firmware on the Stim?
Also, a couple of basic questions - should I be using MS2 or MS2-Extra code for my project? Based on this, should I use TS or MT (I bought the full version of TS in anticipation of using VE Analyze Live.
Thanks in advance for your patience and help.

[ThrockmortonWhump]

Oh, and also:
-the FP LED lights as normal (2 seconds-ish) when powering up
-all 3 LEDs light on the controller (INJ, WARMUP & ACCEL) light VERY briefly when powering up

Thanks

[jsmcortina]

Have you "calibrated" you sensors?

Have you set the spark mode to "EDIS" and the JimStim wheel mode to EDIS/distributor?

Perhaps post a datalog and the tune file (File SaveAs) you are using.

Stick with TunerStudio only.

James

[ThrockmortonWhump]

Thanks for your reply.

I did not calibrate the MAT or CLT, I thought the Stim would replicate the standard GM sensors (which I'll be using on the car)
I have the O2 set to LC1 (0-5V) - is this not correct for the Stim?
I remember setting the spark mode to EDIS, but I'll double-check.
The DIP switches on the Stim are all left to "off" for EDIS / Distrib.
I'll re-check these things and try to post an MSQ tonight.

Thanks again for your support.

[ThrockmortonWhump]

Hi again,

Tonight I went through the ignition and sensor settings in TunerStudio (all writes / burns to controller work fine w/ no errors, so communication looks good.)

- I confirmed all spark settings for Ford EDIS as described at http://www.msextra.com/doc/ms2extra/MS2-Extra_EDIS.htm
- I calibrated the thermistor tables by setting MAT and CLT as "GM"
- I calibrated the AFR table as "LC1 Default"
- I calibrated the MAP as MPX 4250 - this gave a slightly fluctuating reading @ 99.6 - 99.8 kPa - working good

So, now TPS and MAP working correctly but MAT, CLT, O2 and RPM are not variable with JimStim pot changes.

msq file is attached

Thanks in advance for your advice.

[ThrockmortonWhump]

Tonight I checked JimStim settings for ignition:
- tested tach signal following directions at :http://www.jbperf.com/JimStim/JimStim_v ... ml#testing - working OK
- confirmed jumpers correctly installed for primary ignition square wave and 12V pull-up
Still no RPM signal in TS

Also found WB jumper on JimStim not in place:
- checked with TS configured for narrow band - still no movement of AFR in TS (gauge needle steady at about 11.3, # shows as 0.00)
- installed WB jumper and tried with TS configured for LC1 default - still no movement of AFR in TS (gauge needle steady at about 11.3, # shows as 0.00)
Which WB configuration should be used in TS when JimStim is jumpered for WB?

What concerns me most is that 'Battery Voltage' shows 0 in TS real time display, yet JimStim is obviously powered up, and MS controller seems to communicate with TS without issues.

Can anyone point me in the right direction? Thanks very much.

[ThrockmortonWhump]

Tonight I confirmed:

Voltage from power supply at screw terminals = 12.27V
When JimStim is turned on:
Voltage at 3-pin 12V header at regulator = 11.47V
Voltage at single 3V pin header = 3.29V
Voltage at 12V pull-up jumpers = 11.48V
Voltage at 12V screw terminal = 11.36V
Voltage at 5V screw terminal = 4.91V when connected to MS controller
At CLT screw terminal, voltage changes from 3.97V to 0V as pot is turned clockwise and MS controller is connected
At MAT screw terminal, voltage changes from 3.89V to 0V as pot is turned clockwise and MS controller is connected
At 02 screw terminal, voltage changes from 0V to 1V as pot is blah blah blah

So, it looks like my JimStim is doing what it should.
Should I abort this thread and re-post as a configuration problem in the MS2/Extra forum?
Any feedback would be great, thanks.

[jsmcortina]

What concerns me most is that 'Battery Voltage' shows 0 in TS real time display, yet JimStim is obviously powered up, and MS controller seems to communicate with TS without issues.

What voltage do you measure across "H1" the boot-jumper pin header/holes on the mainboard ?
Note that this isn't used with MS2 and should be open.

James

[ThrockmortonWhump]

James,
Thanks for your reply.
With the JimStim connected and turned on, I measure 1.85V across the 'boot' holes (there is no pin header installed, so yes, it is open.) Is this the value I should be getting?
Before connecting the Stim, I measured resistance between the holes, it is infinite, no short.
I'm going to start going through the MS troubleshooting page, but I'd appreciate any experience that anyone could share.

Thanks,

Cory

[jsmcortina]

Turn the power off, remove the MS2 card, power on again and check the voltages are per


James

[ThrockmortonWhump]

James,
Thanks for your prompt reply.

I measure:

Pin 1 4.96V
Pin 2 0V
Pin 16 10.72V too low?
Pin 19 0V
Pin 20 4.96V
Pin 31 0V
Pin 32 4.95

Only pin 16 is not as you specified, but it's somewhat close.

Thanks,
Cory

[Matt Cramer]

That voltage is still within spec - the "12 volt" side is really a bit all over the place.

[ThrockmortonWhump]

Thanks Matt.

Any ideas why battery voltage is showing '0' in TS realtime display or if this is what's causing TS not to see changes in MAT, CLT, O2 and RPM from the JimStim?

Thanks,

Cory

[jsmcortina]

I'm thinking that either you have some bad settings or a hardware fault. Please attached your MSQ and a datalog.

James

[ThrockmortonWhump]

Thanks, I'll do it tonight.

Cory

[ThrockmortonWhump]

Attached is the current tune used for the JimStim and a datalog (not much to see)

Thanks,

Cory

[ThrockmortonWhump]

It was a settings issue.
I visited a friend of a friend who has a lot of MS experience. We flashed the new Ms2-Extra 3.0 code and started with the default tune - everything worked correctly.
Then we loaded the old tune I had developed, and suddenly RPM and everything else except TPS and MAP wouldn't change. Something on 'page 0' of the settings was causing the problem, but we couldn't find which.
I deleted the old tune and will carry on with the new. Now, back to wiring the car.
Thanks James for your help.

Cory

[racingmini_mtl]

If you started a tune off line without first loading an existing good msq or connecting to a working MS then you have created an msq full of zeros that will never work right since you can't correct all the wrong settings from the user interface. TS should prevent this from happening but may not do it in all cases and MT will definitely let you do this and hang yourself.

If that's not what happened, it might be that data got corrupted at some point for some reason (communication error maybe?) and that got saved in your msq. Frequent backups of a working setup are a good idea.

Jean

[ThrockmortonWhump]

Yes, this was a newbie error - I hope this thread can prevent others from making the same mistake.

Because most of the MS2 documentation refers to MegaTune, that is where I started. I couldn't wait for my USB-Serial adaptor to arrive, so I began playing with the tuning software to familiarize myself.

I also wasn't clear on the difference between MS2 and MS2-Extra (ie. the origins of the firmware and some of the feature differences).

My advice to other new users is to use MS2-Extra code and TunerStudio exclusively. Stick to the documentation at http://www.msextra.com/doc/index.html, only referring back to the Megamanual for specific things you're looking for (about hardware, sensors etc.). Always make tuning changes when connected to the controller. Frequently save your changes with "Save As". If anything stops working, go back to your last known good tune, or as a last resort, go back to the default sample tune that downloads with your firmware.

Thanks everyone for their interest & hope this is helpful,

Cory