The Tuner offers diagnostics and repairs to EGR systems.
How Do EGR Valves Work?
The EGR Valve creates a loop back from the exhaust manifold to the intake manifold to recirculate burnt gases. The EGR valve has a solenoid which controls the valve which in turn is controlled by the ECU.
The ECU operates the solenoid by using a duty request cycle in order to open the valve and recirculate the burnt gases.
The Manifold Absolute Pressure sensor is then used to record the amount of additional gas which subsequently feeds back to the ECU as a control measure.
EGR Valve Problems
- EGR valve is stuck open ( Excessive flow)
- EGR valve is stuck closed ( Restricted flow)
- EGR Sensor or Solenoid failure
- Black smoke from exhaust
- Lack of power