Turbo Pressure Sensor

[clifftrail]

Anyone ever tinkered with the stock pressure sensor? There are three wires coming off it, orange, white and brown.

I want to datalog boost to the LM-1 and I'm figuring one of these wires comes out as a 0-5V reading for boost. At least thats what the specs say. Anyone ever tried this? Looking at a wiring diagram, it looks like white goes to the stock boost gage but it's really not that clear.

I'm going to tinker with it anyway, but if someone has tried it you may save me from butchering a couple of innocent wires.

 

[ma71supraturbo]

orange is 12V power, brown is ground, white is signal IIRC. It's fairly worthless map sensor, if you want to do some datalogging just get a GM map sensor and wire the same (power, ground, 0-5 v signal).

 

[turboa7mgte]

with the car running probe the white wire and see if the voltage fluxuates if it does then that is your signal. If not try the orange one wire will be a constant 5v I can look when I get home from work to verify the color for sure if you want.

I run the turbo A ECU and and that is how the map sensor sends the boost/vac readings to the ECU so in theory it should work. My SAFC reads the pressure signal as boost and vac so I think it would work.

 

[encomiast]

I'm also datalogging the signal of the stock pressure sensor, it's actually working quite nice. However, I can't tell you the color right now because I'm at work....

BTW the only reason why the stock boost gauge is worthless is the signal conversion/smoothing circuit between the sensor and the gauge.

 

[clifftrail]

Good stuff, thanks all.