gm map sensor

[Jeff Webb]

hamid gatch-karan wrote:
> I am looking for data shits for 1 bar, 2 bar , 3 bar
> gm map sensor.
> Have anybody the addresses of these data sheets?

I am interested in this as well.  I'll probably try to do a calibration
myself sometime soon.  If anyone has some calibration data, please post
it to the list.  

The only data I have is something that someone posted several years
ago.  I have attached it below.

Jeff Webb

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>


GMC EFI engine MAP sensors calibration data, page one

Input   model 460       model 835       model 834
IN Hg   output VDC      output VDC      output VDC
0       4.620           4.602           0.560
-1.0    4.442           4.424           0.741
-2.0    4.264           4.249           0.923
-3.0    4.086           4.075           1.105
-4.0    3.908           3.899           1.287
-5.0    3.73            3.724           1.469
-6.0    3.552           3.548           1.652
-7.0    3.374           3.370           1.834
-8.0    3.196           3.195           2.016
-9.0    3.018           3.019           2.199
-10.0   2.84            2.842           2.380
-11.0   2.662           2.667           2.562
-12.0   2.484           2.485           2.745
-13.0   2.306           2.303           2.928
-14.0   2.128           2.121           3.111
-15.0   1.95            1.940           3.293
-16.0   1.772           1.758           3.475
-17.0   1.594           1.577           3.657
-18.0   1.416           1.395           3.840
-19.0   1.238           1.219           4.022
-20.0   1.178           1.043           4.204

b=4.610  
m=0.176

Connector       green   red     gray
output wire     green   green   green

sensor  0 to 28"Hg      0 to 28"Hg      0 to 28"Hg
range   direct acting   direct acting   reverse act.

output volts    0.175V  0.178V          0.182V
per inch Hg.
input


GMC EFI engine MAP sensors calibration data, page 2.

Input   model 833       Input   model 886
?       output VDC      IN H2O  output VDC
0       4.629           0.0     2.347
0.1     4.612           0.5     2.435
0.2     4.593           1.0     2.522
0.3     4.575           1.5     2.610
0.4     4.557           2.0     2.698
0.5     4.539           2.5     2.786
0.6     4.521           3.0     2.874
0.7     4.502           3.5     2.961
0.8     4.484           4.0     3.049
0.9     4.466           4.5     3.136
1       4.448           5.0     3.224
1.1     4.429           5.5     3.312
                        6.0     3.395
                                
sensitivity                     sensitivity     
0.182V/inch Hg          0.175V/inch Hg  

Connector       blue            Connector       yellow
output wire     gray            output wire     green
wire stripe     black trace     wire stripe    ??
sensor  ???                     sensor  -25" to +9#
range   reverse act.            range   reverse act.

Data was given in inches water for the 886. Unit of measure were not 
specified for the 833. Possibly the data represents about 0.18 volts 
output per inch mercury pressure input for both 886 & 833.
----------------------------------------------------------------------------
To unsubscribe from diy_efi, send "unsubscribe diy_efi" (without the quotes)
in the body of a message (not the subject) to majordomo at lists.diy-efi.org