H
hotrod
- Jan 1, 1970
- 0
Hello, I am trying to clean up the engine bay of my Mustang. It is
drag car and I no longer need emissions equipment.
I want to remove what is called the EGR system. Exhaust Ga
Recirculation
This consists of a solenoid which controls vacuum to a EVP Exhaus
Valve Position Sensor
It is a potentiometer I believe. It is a plunger that moves in and ou
when vacuum is applied/removed. I have completely removed the vacuu
to it and it always read closed, giving me a check engine light. Yo
can trick it by wiring a gizmo to the connector to make the EEC (ca
computer) always things it is open and getting a signal
There are 3 wires
1)VREF (voltage referecne from computer) This is 5.0volt
2)Signal Return (ground to computer
3)Signal Voltage to computer
As vacuum is applied to the vavle, the plunger moves and sends a lowe
voltage (from 5.0volts) to the computer
The test for the sensor is 5500 ohms fully closed, to 100 ohms full
open
I do not know how to wire the 3 wires or what to use for parts to mak
a permanent, say 2500 ohms signal to the computer. I understand tha
the sensor is supplied 5.0 volts and the potentiometer (?). Whe
there is no vacuum present, the computer sees very little voltage
and as vacuum is applied, the plunger moves and drops resistance
allowing more voltage to be read by the computer
I know there is a simple way to wire up the sensor to put it at
constant 2500 ohms or so, but I do not know what to use. Would I us
a transistor, multiple resistors
I can fool the computer by locking down the plunger to read hal
closed, but I want to removed the sensor altogether and replace i
with a simple resistor type settup that I can connect directly to th
wires inside the car near the computer
Thanks for any help. I do know some electronics, but it is limited t
fairly simple circuits. I'm not really a beginner, but don't have an
formal training or schooling
Pau
drag car and I no longer need emissions equipment.
I want to remove what is called the EGR system. Exhaust Ga
Recirculation
This consists of a solenoid which controls vacuum to a EVP Exhaus
Valve Position Sensor
It is a potentiometer I believe. It is a plunger that moves in and ou
when vacuum is applied/removed. I have completely removed the vacuu
to it and it always read closed, giving me a check engine light. Yo
can trick it by wiring a gizmo to the connector to make the EEC (ca
computer) always things it is open and getting a signal
There are 3 wires
1)VREF (voltage referecne from computer) This is 5.0volt
2)Signal Return (ground to computer
3)Signal Voltage to computer
As vacuum is applied to the vavle, the plunger moves and sends a lowe
voltage (from 5.0volts) to the computer
The test for the sensor is 5500 ohms fully closed, to 100 ohms full
open
I do not know how to wire the 3 wires or what to use for parts to mak
a permanent, say 2500 ohms signal to the computer. I understand tha
the sensor is supplied 5.0 volts and the potentiometer (?). Whe
there is no vacuum present, the computer sees very little voltage
and as vacuum is applied, the plunger moves and drops resistance
allowing more voltage to be read by the computer
I know there is a simple way to wire up the sensor to put it at
constant 2500 ohms or so, but I do not know what to use. Would I us
a transistor, multiple resistors
I can fool the computer by locking down the plunger to read hal
closed, but I want to removed the sensor altogether and replace i
with a simple resistor type settup that I can connect directly to th
wires inside the car near the computer
Thanks for any help. I do know some electronics, but it is limited t
fairly simple circuits. I'm not really a beginner, but don't have an
formal training or schooling
Pau