What temperature should Doc Inlet?
750°F
The DOC inlet temperature should be greater than 400°C (750°F).
What should DOC inlet pressure be?
The DOC inlet pressure should be less than 9 kPa (1.3 psi) for a 1-Box ATS and 12 kPa (1.74 psi) for a Two-Box ATS.
What is a one box on a Freightliner?
The 1-box aftertreatment setup was developed by Detroit® engineers to meet the EPA’s EPA10 emissions standards. It contains the diesel oxidation catalysts (DOC), diesel particulate filters (DPF), and selective catalytic reduction device (SCR) to ensure the air coming out of the engine is cleaner than the air going in.
What is code SPN 3251?
SPN 3251/FMI 0 – EPA07 This diagnostic is typically Diesel Particulate Filter (DPF) Pressure Out of Range Very High. This fault code sets when the DPF outlet pressure is greater than 35 kPa (5 psi) for more than 10 seconds.
What is a doc temp sensor?
The exhaust gas temperature sensor (EGTS), which is located in front of Diesel Oxidation Catalyst (DOC) and/or in front of Diesel Particulate Filter (DPF), detects exhaust gas temperature and converts it into a voltage and feedback engine ECU with the voltage signal in order to control engine condition to effectively …
What should Regen Temps be?
Active regeneration is usually not noticeable to the driver. The vehicle needs to be driven at speeds above 30 mph for approximately 20 to 30 minutes to complete a full regeneration. During regeneration, the exhaust gases reach temperatures above 1,000°F (550°C).
What causes DOC face plugging?
Under normal operation, a DOC would not be expected to plug. However, poorly maintained engines or operation in extreme cold may cause face plugging. The two most common engine failures that can plug a DOC are fuel injector or turbocharger failures that result in fuel or lube oil being fed into the exhaust system.
What is the difference between DD13 and DD15?
They find the DD13 tends to be the best fit in regional applications, while the DD15 leads the long haul segments where fuel economy and performance are most important. Each 100-rpm reduction saves 1% of the fuel bill, an estimated $730 per year.
How does a DPF regenerate?
DPF active regeneration Active regeneration happens when extra fuel is injected automatically as the filter reaches an approximately 45% full limit. The extra fuel raises the temperature of the exhaust and burns off the stored soot.
What should the coolant temperature be in the Doc inlet?
The DOC inlet temperature should be greater than 400°C (750°F). Ambient temperature will have a large impact on DOC inlet temperature. If it is not above 400°C (750°F), block off part of the radiator. Be careful that coolant temperature does not go high enough to cause a Check Engine Light.
What does the DPF code mean on a diesel engine?
All rights reserved. DescriptionThis Code Sets when the Diesel Particulate Filter (DPF) Outlet Temperature is greater than 760°C (1400°F) for More than Two Seconds NOTE: A cold soak may take up to eight hours.
Is there a way to check the wastegate on a DD13 engine?
No; inspect the ITV. Also for DD13 engines, the wastegate is command “on” during a Parked Regen; inspect the wastegate actuator and the plumbing to and from the actuator. Yes; Go to step 11. View the Jake Brake® -1 (PWM 13).
