Cobb's Diesel Performance, LLC
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Smarty w/ DPF & EGR Delete Install
You HAVE to follow these instructions in order to gain a code free EGR / DPF delete and see the full power
potential !
Using the EGR /DPF off option on a stock truck will result in severe engine and exhaust system damage!
The late injection events ( formerly know as the 4th injection ) are turned OFF! Thus NO regeneration
can take place even if the ECM commands it! The DPF will plug and result in excessive back pressure!
The option to turn the DPF/EGR off is in the Revo options menu . Select “ 1 “ to turn the DPF and EGR off and
eventually “0” should you want to return the truck back to stock conditions..
Required exhaust modifications :
* The DPF and catalyst(s) need to be replaced with an after market exhaust system.
* Starting from software revision “V:6.09A D:R12ME” the original exhaust gas temperature thermocouples are no
longer needed! You can simply unplug them and seal the OEM connectors in the wiring harness with electrical
tape.
If you already use thermocouple simulators ( “SIMS” ) you can eventually leave them in place but we HIGHLY
recommend to remove them! We have found a wide variety of problems caused by out of spec / faulty / false
contacts SIMS. Thus it is best to remove them!
* The oxygen sensors are not needed ( can be unplugged ) but if you have an exhaust system that already has the
provision for these probes they can remain plugged in and used.
* The exhaust differential pressure sensor ( on the top of the transmission, passenger side ) has to remain plugged
into the factory harness but the rubber lines coming from the stock exhaust have the be unplugged from the sensor.
Posted in Dodge Cummins 6.7L
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