H&S XRT Pro Installation & Operation Manual page 30

a loss of power (limp mode).
When running High Sulfur tuning, it is recommended that all sensors located in the factory
exhaust system be unplugged from the electrical harnesses. These sensors can also be re-
moved completely with the factory exhaust if desired. On the 2007.5 - 2009 6.7L Cummins,
there are usually 3 EGT Sensors, 2 O2 Sensors, and 1 Pressure Sensor.
egr emissions equipment
If you are installing H&S High Sulfur tuning, you must unplug the EGR system on your 2007.5 - 2009
6.7L Cummins if not installing an EGR delete. Failing to do so may result in erratic engine operation and
loss of power. Please follow these instructions carefully to unplug and disable the EGR system:
1. Locate the EGR Throttle Control Valve Assembly (Fig.1). Assembly is located between the inter-
cooler and intake manifold on the drivers side of the engine compartment.
2. Unplug the EGR Throttle Control Valve wiring harness. The harness is LIGHT GRAY in color and
is located on the back side of the Throttle Control Valve Assembly. It is not directly visible when
looking at the assembly from above. On some vehicles, it may be easier to see and unplug
the harness from underneath the vehicle. Note: There is a red locking tab that must be moved
sideways on the harness in order for it to be unplugged.
3. Locate the EGR solenoid on top of the intake manifold (Fig.2). It is directly visible when looking
at the intake manifold and faces towards the front of the vehicle.
4. Unplug the EGR solenoid wiring harness. The connector is BROWN in color.
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