When to replace hydraulic EGR in Detroit Diesel engine?
When to replace hydraulic EGR in Detroit Diesel engine?
The newer, more efficient cooler can be retrofitted to earlier Series 60 engines with kit PN 23533985, an operation that calls for reflashing the computer on DDEC IV engines built before 06R0755298. The hydraulic EGR unit must be extracted from the original cooler and pressed into the replacement part.
How does the ECM change the EGR valve?
The ECM changes EGR valve position by regulating air pressure output from the VPOD to an actuator mounted to EGR valve. The EGR valve outlet is connected to the EGR cooler and recirculates a fraction of the engine exhaust gases to the intake manifold for purposes of engine emission control.
What does EGR stand for in exhaust valve?
EGR Valve stands for exhaust gas recirculation valve, which breaks down exactly what it does. Recirculating the exhaust does a few things for overall performance. First, it optimizes the fuel to air ratio without pulling in extra air from the intake.
What are the symptoms of a bad EGR valve?
When there is a problem with the EGR Valve, the check engine light or EPC(VW) light may occur on your dashboard. The two main issues EGR valves face are that, either the valve stays open or it shuts completely. Here are some common symptoms you will notice if you have a bad EGR valve.
How to check Series 60 EGR section 10.4?
If the supply pressure is between 703-1296 kPa (90-120 psi), perform a VPOD Part Number and Supply Voltage Test “10.4.3.4 VPOD Part Number and Supply Voltage Test and Part Number Check” . Verify repairs. Perform the follow steps to verify the VPOD part number and supply voltage.
How to do an EGR test on a Detroit Diesel?
If the PWM voltage measurement is incorrect and the wiring checks were correct, try a test ECU programmed for EGR or contact the Detroit Diesel Customer Support Center at 313-592-5800. Verify repairs. Perform an Active Codes Test “10.4.3.6 Active Codes Test” .
What to do if your EGR valve is not working?
Physically inspect the EGR valve for a mechanical failure. If the EGR valve is not functioning correctly, replace the EGR valve. Visually inspect the EGR cooler for restrictions. If the EGR cooler is restricted, replace the EGR cooler.
What’s the boost pressure on the EGR valve?
Connect a regulated air supply line to the EGR actuator regulated to 69 kPa (10 psi). Using DDDL, activate the EGR Valve (PWM #2) to 90%. Monitor the boost pressure for pressure drops when the EGR valve opens.
