| Author | Topic |
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Location:
Sydney
Registered:
October 2003
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Re: st185 GT4 boost sensor
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Mon, 04 April 2005 05:21
 
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Probably not the greatest idea as you'll be loosing your 'boost cut', but this was suggested to me when I was struggling to find one. It's basically just making something to send a signal to your ECU to say that everything's ok.
| JimKing |
To carry off this deception, you probably want to use a resistor "bridge". You use two resistors in series wired between ground and the +5v MAP sensor supply. You connect the MAP signal wire to the junction between the two resistors. The junction voltage is proportional to the resistances.
Vj = R2 / (R1 + R2) * 5.0v, assuming R2 is connected to the 5v supply, and R1 is connected to GND.
A two bar map sensor should read about 2.5v at 0.0psi, so if you want to simulate that, then a couple 10k ohm resistors should do.
See if this artwork helps:
.........R1.....................R2
.
..|---\/\/\/\/\----O----/\/\/\/\/----|
..|....................|.......................|
..|....................|.......................|
.GND...............Vj...................+5V
..............(to ECU PIM input)
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