Oil Pressure Sender Voltage??
02-01-2010, 07:53 AM
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Oil Pressure Sender Voltage?? Hi, wondering if anyone can tell me the voltage to oil pressure values for a 98 sender.
0v = xx psi of oil pressure?
5v = xx psi of oil pressure?
Need this to calibrate the sender for a stand-alone computer.
0v = xx psi of oil pressure?
5v = xx psi of oil pressure?
Need this to calibrate the sender for a stand-alone computer.
02-01-2010, 02:48 PM
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The oil pressure sender works like this.
The Engine Oil Pressure is displayed by the Oil Gauge. The pointer of the gauge is moved by current flow through two Coils and is similar in operation to the Fuel Gauge. The Fuel Pump Oil Pressure Switch and Sender senses Engine Oil Pressure. The Oil Sender has a low resistance (approximately 0 ohms ) when Oil Pressure is low (0 psi) and a high resistance (approximately 90 ohms ) when Oil Pressure is high (80 psi) .
5v=0 psi
0v=80psi or somewhere in the ballpark.
EDIT: This **** doesnt make sense. The gauge returns when the ignition is off. So that means that it requires voltage to be swept upwards mean that if pressure goes up resistance would go down.
Ill check into it a little more when i get out of this class.
The Engine Oil Pressure is displayed by the Oil Gauge. The pointer of the gauge is moved by current flow through two Coils and is similar in operation to the Fuel Gauge. The Fuel Pump Oil Pressure Switch and Sender senses Engine Oil Pressure. The Oil Sender has a low resistance (approximately 0 ohms ) when Oil Pressure is low (0 psi) and a high resistance (approximately 90 ohms ) when Oil Pressure is high (80 psi) .
5v=0 psi
0v=80psi or somewhere in the ballpark.
EDIT: This **** doesnt make sense. The gauge returns when the ignition is off. So that means that it requires voltage to be swept upwards mean that if pressure goes up resistance would go down.
Ill check into it a little more when i get out of this class.
Last edited by NBM-LS1; 02-01-2010 at 02:54 PM.
02-02-2010, 10:37 AM
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The sender works like I had previously described.
There is a little clock spring that will return the needle back to zero.
If you were to turn the car on and unplug the sender it would go to full psi. Thats because there is an open. Now if you plug it in with the car off the low resistance in the sender pulls the needle to full low. once the engine is started and the pressure raises the resistance will raise. causing the needle to be pulled back causing the needle to read a pressure.
This may be confusing so if you need further explanation lmk.
02-02-2010, 05:42 PM
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Oh ****...thanks for the explanation, but without context I suppose you don't know if you're helping me or not.
Long story short, my LS1 project is into a '95 240sx. I won't be using the stock PCM and won't be using any stock dash configuration.
I'll be wiring all of my sensors into an aftermarket ECU (ViPEC V88) and will then be sending the data over canbus to a RacePak IQ3 Logger dash.
Therefore, in order to take advantage of the oil pressure sender that is already on the motor, I just need to know what it outputs. If I know the scale (0-5v = 0-80psi) I can simply input that scale into the ViPEC and have the sender calibrated. Then it can send that calibrated data over to the dash and I can see realtime oil pressure.
Make sense? and thx.
Long story short, my LS1 project is into a '95 240sx. I won't be using the stock PCM and won't be using any stock dash configuration.
I'll be wiring all of my sensors into an aftermarket ECU (ViPEC V88) and will then be sending the data over canbus to a RacePak IQ3 Logger dash.
Therefore, in order to take advantage of the oil pressure sender that is already on the motor, I just need to know what it outputs. If I know the scale (0-5v = 0-80psi) I can simply input that scale into the ViPEC and have the sender calibrated. Then it can send that calibrated data over to the dash and I can see realtime oil pressure.
Make sense? and thx.
