A few times today, driving to work, the display on Scanmaster cycled thru some numbers, instead of the steady -30 . . . but only for a second.

 

something to keep in mind - The egrt plug and the windshield washer sensor plug are identical. They are also close to the same location. - just throughing that out there.

what do you get when you measure ground to signal with the key on?

sam

 

You may be on to something here! I noticed after hooking this up that there is a "low washer fluid" light coming on the dash. I just went out to parking lot, and if I unplug the MAP sensor, the light goes out.

I don't have a voltmeter available now, but I think when I did this last night that ground to signal was around 6V I thought that odd, but really don't know what is going on anyway.

The connector I used was empty, taped up with some others between the strut tower and firewall. It has a black wire and yellow w/green tracer. I don't see another connector like it. There is another empty one, T-shaped with two wires, black and green.

 

I added a MAP sensor to allow logging boost, but can't get it to work correctly. I have searched and read a bunch of info, but have not seen the same problem I am having.

The MAP sensor is hooked up per instructions. Two wires are going to EGRT connector, ground and signal. One wire is going to 5V ref wire on TPS sensor. If I unplug the connector from the MAP sensor, with the key on, there is 5V across the outside pins, which I think should be correct.

On the Scanmaster I configured the Ad0 parameter to 2 (3-bar boost), and set the DSA parameter to 1 (display Boost as Air Volume)

In MMCd I set the EGRT preference to 3BAR.

Results: When I turn on the ignition, or start the car, the Bst value on Scanmaster display pegs at 30 and never changes. Also, I do not see an AIRV measurement as one to select in MMCd

I am probably just missing something simple . . . any ideas?

I'll let TurboBob address any ScanMaster configuration / display issues but I may be able to help on the MMCd / EGRT side.

MMCd EGRT input config is for MAP sensors connected to the unused EGRT input on 1G Federal ECU. If you are connecting the MAP sensor to an analog input on the ScanMaster, it will be mapped to airflow, NOT the MAP sensor in the MMCd display.

Good starting point for any new sensor hookup is to confirm good voltages coming from the sensor with a meter. Engine off should see a voltage that corresponds to atmospheric pressure and with engine on you should get approximately -10 PSI. (If voltage from sensor goes down a volt or two when you start the car it is a good sign.)

 

+5V - TPS Connector (Green/Yellow)
Ground - EGTR Connector (A22 - Black)
Signal - EGTR Connector (A22 - Light Green/Black)

The egrt plug wires should be black and light green/black
http://www.3si.org/forum/showthread.php?t=202062&highlight=mmcd

sam

Edit add
The connector you want is located between the battery and the firewall. Mine was taped up pretty much below the resistor pack

 

On the Scanmaster I configured the Ad0 parameter to 2 (3-bar boost), and set the DSA parameter to 1 (display Boost as Air Volume)

You don't neet the dSA parameter with MMCd, it is really for the TMO guys that don't have a way to view it. Set dSA back to zero. You can view boost directly in MMCd on the EGRT field.

Otherwise the Scanmaster is configured correctly, and Clint is the best for MMCd configuration.

Bob
(good call on the washer bottle plug....)

 

After doing a quick parking lot check (man . . . it is HOT out there), I am thinking that I may be hooked to the wrong connector, as Sam suggested.

I can't find a loose connector that looks like the picture in the rdmelton boost logging site: Boost Logging
Is it possible that someone plugged the EGRT connector into the washer sensor? My windshield washer does not work, pointing to the possiblity that a previous owner removed the assembly attempting to fix it. (then maybe plugged the wrong connector in)

The connector I attached the MAP sensor to "looks" like the picture in the site mentioned above, but the wires are Yellow/GR and Black, not LightGreen & Black.

There is a loose connector in the area with green and black wires, but it looks totally different. It is "T" shaped female.

 

http://rdmelton.autoeducation.com/cars/stealth/boostlog.html - hey the first picture on that site showing the sensor is of my car

Is it possible that someone plugged the EGRT connector into the washer sensor?

Exactly

sam

 

I ended up having to remove the battery to find the connector.

sam

 

Skunkworks Sam NAILED IT !!

A previous owner plugged windshield washer fluid sensor into the EGRT connector! In fact they then went to the trouble of taping the washer connector up along with the washer motor connector and a bunch of other loose connectors. If I did not know better I would think they did this to play a joke on me. I have been struggling with this for many hours.

More good news is that my windshield washer works now!! All I had to do was take plug in the power connector to the motor. (this was the T-shaped green and black connector I mentioned earlier in thread).

The Stealth gets better, a little bit at a time.

Thanks guys . . . I probably never would have figured this out on my own.

 

You don't neet the dSA parameter with MMCd, it is really for the TMO guys that don't have a way to view it. Set dSA back to zero. You can view boost directly in MMCd on the EGRT field.

Done . . . (set back to zero)

I did not start or drive the car yet, but it now displays .7 in the Bst field with the key on. I think I remember reading somewhere that it might not be exactly zero, so I am assuming that everything is working now.

Thanks for the quick response.

 

Glad to hear it - boost logging is one of the best mods I have done. Thanks again to clint and jeff.

Good luck.

 

Skunkworks Sam NAILED IT !!

A previous owner plugged windshield washer fluid sensor into the EGRT connector! In fact they then went to the trouble of taping the washer connector up along with the washer motor connector and a bunch of other loose connectors. If I did not know better I would think they did this to play a joke on me. I have been struggling with this for many hours.

More good news is that my windshield washer works now!! All I had to do was take plug in the power connector to the motor. (this was the T-shaped green and black connector I mentioned earlier in thread).

The Stealth gets better, a little bit at a time.

Thanks guys . . . I probably never would have figured this out on my own.

The bad news is that you no longer have windshield wiper motor logging...

 

The bad news is that you no longer have windshield wiper fluid low logging...

:headbang:

 

The bad news is that you no longer have windshield wiper motor logging...

I could not stop smiling earlier when I found that connector with the green and black wires (knowing that the problem was probably finally resolved)

Now I can't stop laughing . . . that was a good one.

Thanks for your help, and thanks for the laugh!

-Ron

 

Getting close

I have another, hopefully easy, question. Boost is showing fine on the Scanmaster display, shows up fine as PSI on the Palm display and charts, but when I export it to Excel using MMCd tools, it shows in the spreadsheet as EGRT and degrees F. What should I look for to make this work?

Second question (not as important), is there a simple conversion for the degreeF values to PSI? I would kinda like to use the logs that I ran yesterday, because I will be out of town and not able to recreate them for a while.

 

Getting close

I have another, hopefully easy, question. Boost is showing fine on the Scanmaster display, shows up fine as PSI on the Palm display and charts, but when I export it to Excel using MMCd tools, it shows in the spreadsheet as EGRT and degrees F. What should I look for to make this work?

Second question (not as important), is there a simple conversion for the degreeF values to PSI? I would kinda like to use the logs that I ran yesterday, because I will be out of town and not able to recreate them for a while.

.. a new release of MMCd Tools




Clint

 

From here
http://www.3si.org/forum/showpost.php?p=2135050&postcount=45
It has been a while since I have done it and I think you have to use the raw egrt data.

It had been a while since I ran MMCd Tools (for some reason it crashes the Hotsync program after transferring the file is transferred so I uninstlled it.)

SPoulson did a good job of keeping the XLS very general... you have English / Metric and Raw data to work with

Scaling for new sensort types:

3 BAR
BAR = (ADC * 0.0117647) + .1
PSI = (ADC * 0.170632588) - 13.0534

2.5 BAR
BAR = (ADC * 0.0098039) +.1
PSI = (ADC * 0.142193511) - 13.0534

2.0 BAR
BAR = (ADC * 0.0078431) +.1
PSI = (ADC * 0.113755059) - 13.0534

Wideband (0-255 counts = 10-20 AF)
AF = (ADC * .03921569) + 10

 

Thanks AGAIN guys!!

Yeah, I recently updated MMCd, but did not get new tools.

Now I can fool with my logs, if I get some time while away.

 

the conversion is:
Pressure (in psig) = -0.0632*(Temperature in °F) + 23.08

 

the conversion is:
Pressure (in psig) = -0.0632*(Temperature in °F) + 23.08

I get the hint... (unfortunately, the EGRT temp scaling is a non-linear function using a lookup table so any linear re-scaling will produce significant errors.)

I'll crank out a MMCdTools release that provides scaling and gets rid of a bunch of other problems. (Suppress inactive sensors / more logical ordering, etc etc.)


Clint

 

I am having trouble with the result I log from my Greddy pressure sensor.

My setup.
1. I have the "signal" line from the Greddy sensor connected to the correct wire on the EGRT plug.
2. I don't have the other line on the EGRT grounded.

My Eo1 says I am boosting 6.5 PSI however, I never log more than 3PSI or so at that boost on the logger.

Do I need to ground the second wire of the EGRT plug to get a correct reading? Or is something else going on?

Best regards,
Sean

 

I am having trouble with the result I log from my Greddy pressure sensor.

My setup.
1. I have the "signal" line from the Greddy sensor connected to the correct wire on the EGRT plug.
2. I don't have the other line on the EGRT grounded.

My Eo1 says I am boosting 6.5 PSI however, I never log more than 3PSI or so at that boost on the logger.

Do I need to ground the second wire of the EGRT plug to get a correct reading? Or is something else going on?

Best regards,
Sean

Several thoughts:

1. No need to connect the ground of the EGRT nput. (All of the ECU inputs are single ended with respect to ECU ground)

2. Advise which scalinig youa re using ini MMCd for the sensor. (Do they describe the sensor as a 3 bar sensor?)

3. Advise voltage on EGRT input at 0 psi (ignition on but engine not running) and at 6 PSI


Clint

 

Several thoughts:

1. No need to connect the ground of the EGRT nput. (All of the ECU inputs are single ended with respect to ECU ground)

2. Advise which scalinig youa re using ini MMCd for the sensor. (Do they describe the sensor as a 3 bar sensor?)

3. Advise voltage on EGRT input at 0 psi (ignition on but engine not running) and at 6 PSI


Clint

Clint,
Pref in MMCd is for a 3bar. I was under the impression that the Greddy pressure sensor is a 3bar. Possbily it's more than 3 bar? I will look into this.

I will review logs and let you know what the voltage was at 6PSI. I will check the voltage at power on car not running tonight.

EDIT:
Quick search gave up a couple of forum threads that may help.

Search find 1


Search Find 2

Thanks!
Best regards,
Sean

 

The graph posted is a 4 bar absolute pressure sensor..



Clint