MAP Sensor identification
MAP Sensor identification Is there a way to identify a 1bar, 2bar, and 3 bar MAP?
I think I have a 2 bar MAP, but it is way off according to my CALMAP program. The input voltage is 4.68V.
I am wondering if I have the right MAP sensor installed.
I think I have a 2 bar MAP, but it is way off according to my CALMAP program. The input voltage is 4.68V.
I am wondering if I have the right MAP sensor installed.
Originally Posted by Boostaholic
Keith
how about vs its resistance?
ºC ºF Ohms
100 212 177
90 194 241
80 176 332
70 158 467
60 140 667
50 122 973
45 113 1188
40 104 1459
35 95 1802
30 86 2238
25 77 2796
20 68 3520
15 59 4450
10 50 5670
5 41 7280
0 32 9420
-5 23 12300
-10 14 16180
-15 5 21450
-20 -4 28680
-30 -22 52700
-40 -40 100700
ºC ºF Ohms
100 212 177
90 194 241
80 176 332
70 158 467
60 140 667
50 122 973
45 113 1188
40 104 1459
35 95 1802
30 86 2238
25 77 2796
20 68 3520
15 59 4450
10 50 5670
5 41 7280
0 32 9420
-5 23 12300
-10 14 16180
-15 5 21450
-20 -4 28680
-30 -22 52700
-40 -40 100700
Thanks, that is a help. Does anyone know what the current rate the IAT sensor uses? I will need that to convert the amount of resistance to volts.
Keith
Keith
Originally Posted by MIGHTYMOUSE
how about vs its resistance?
ºC ºF Ohms
100 212 177
90 194 241
80 176 332
70 158 467
60 140 667
50 122 973
45 113 1188
40 104 1459
35 95 1802
30 86 2238
25 77 2796
20 68 3520
15 59 4450
10 50 5670
5 41 7280
0 32 9420
-5 23 12300
-10 14 16180
-15 5 21450
-20 -4 28680
-30 -22 52700
-40 -40 100700
ºC ºF Ohms
100 212 177
90 194 241
80 176 332
70 158 467
60 140 667
50 122 973
45 113 1188
40 104 1459
35 95 1802
30 86 2238
25 77 2796
20 68 3520
15 59 4450
10 50 5670
5 41 7280
0 32 9420
-5 23 12300
-10 14 16180
-15 5 21450
-20 -4 28680
-30 -22 52700
-40 -40 100700
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Originally Posted by MIGHTYMOUSE
im almost certain it is a 5v constant supply and the computer reads what is left of that on the way back after the resistor.
Keith
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ummmmmm
i think the way it works is there is another resistor in the computer with a steady value you will have to find. once you do that and you know the total voltage drop is 5 across the two then you can find the constant current across those two particular values and then use that current on that resistance to find the v drop across the first resistor
http://www.eatel.net/~amptech/elecdisc/resistrs.htm
it would be easier to just measure it with a voltmeter acoss the iat sensor
i think the way it works is there is another resistor in the computer with a steady value you will have to find. once you do that and you know the total voltage drop is 5 across the two then you can find the constant current across those two particular values and then use that current on that resistance to find the v drop across the first resistor
http://www.eatel.net/~amptech/elecdisc/resistrs.htm
it would be easier to just measure it with a voltmeter acoss the iat sensor
Perfect, Thanks that one got bookmarked!
Originally Posted by Boostaholic
This was wierd.
When I unplug the MAP I measure 5.0V supply voltage. As soon as I plug it in, the supply voltage drops down to 3.4. And my calmap shows incorrect pressure.
I put a 5V power supply(from radio shack) tapped into the supply voltage, and it is now working correctly!
Just thought I'd post incase anyone else with a Accel DFI was having the same problem. It has been that was for 4 years now
.
When I unplug the MAP I measure 5.0V supply voltage. As soon as I plug it in, the supply voltage drops down to 3.4. And my calmap shows incorrect pressure.
I put a 5V power supply(from radio shack) tapped into the supply voltage, and it is now working correctly!
Just thought I'd post incase anyone else with a Accel DFI was having the same problem. It has been that was for 4 years now
. 
