Im trying to set up my EBL Flash and I cant for the life of me figure out how to change the default setting for a 1 barr map sensor to the 3 barr im using.

Thanks in advance

 

Set the following flag:

Option Word 2 - Bit 4 - 3-Bar

The EBL Flash Program Group on your laptop/PC has a Calibration Help document. Rather lengthy making finding stuff tough at times, but it has decent info.

RBob.

 

Ok. So I am using the 3005 bin. The base bin seems to work ok.. When I change to a setting for a 3barr sensor the car runs like crap. At idle the display says I'm running 26 kpa with the base bin and 78 kpa with no other modification than changing to a 3 Barr sensor. What's up?

 

Hey, What's Up. Use the What's Up Display and go to the Diagnostic screen. Key-on, engine-off and connect to the ECM. If the calibration's 3-bar MAP flag is set the upper left area will show a 3-bar MAP in use.

That information is from the ECM, so if it is wrong, then the calibration's 3-bar MAP flag isn't set. Or the 2-bar flag is also set (if it shows 2-bar MAP in use).

Now go to the MAP display box, it should show about 102 KPa (about sea level), and about 1.6 volts. That is the correct voltage for a 3-bar MAP sensor. And if the calibration flag is set it should then also properly show the 102 KPa.

If the voltage is in the area of 2.4 volts, then it is a 2-bar MAP sensor. If around 4.8 volts, then it is a 1-bar MAP sensor.

RBob.

 

Did you already hooked up a 3 bar map sensor? I'm assuming you have not yet. Both the 1 and 3 bar map send an output from 0 to 5 volts. 5 volts on the 1 bar map is 1 bar (100 KPa) and 5 volts on the 3 bar is 300 kPa. The numbers you are giving roughly correspond to the difference in values represented by each map sensor at a little over 1.25 volts. If you have the 1 bar hooked up and switch the software to 3 bar, it will scale the kPa vs voltage to what it expects to be from the 3 bar map. 26 kPa seems reasonable for an engine that is idling so I have to assume you still have a 1 bar map installed (or perhaps were sold a 1 bar claiming to be a 3). Since you changed the setting it is now reading from the 3 bar table which corresponds to about 78 kPa at 1.25 volts. It thinks you have much less vacuum than you really have which is causing it to run bad.

 

Ok. I'm partially following. I have tried all three settings. 1-3 Barr. All of these are key on engine off.
1 Barr default setting on 3005 bin is 48kpa @ 2.0 volts
2 Barr (only change) on 3005 bin is 86.6kpa @ 2 volts
3 Barr (only change) on 3005 bin is 126.9 kpa @ 2 volts
All voltages verified by volt meter at the sensor.


The engine runs rougher with anything other than the 1 Barr map setting. Although throttle response may be slightly better with 2 or 3 Barr but not completely sure.

 

Forgot to mention that I already installed the 3 Barr sensor. I just made a run and data logged. I ran the 3005 bin with a setting for 2 Barr map and corrected for my 24# injectors. The car runs 10000 better in the 2 Barr setting than the 1. However I did stall once on tip in and it felt like it was goin to stall at idle the whole time.
I have the data log if anybody wants to see it. Assuming I can figure out how to send it?

 

That is either not a 3-bar MAP sensor or it is bad. A 3-bar MAP sensor should be reading about 1.6 volts and reporting about 102 KPa.

Here is the 3 bar numbers: 16040749, 12223861

If it is a GM sensor the last three digits of the part number are hot stamped on the pad above the connector.

RBob.