ISSPRO R82511 - Manual (Page 2)

Form No. IS157 (Rev. B 05/06/2008 )
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4 Find a location where exhaust backpressure can be measured without the sensor exceeding 275° F.
This typically requires at least a 12” length of metal tubing (typically 3/16” or larger copper) connected
to a tapped hole in the exhaust manifold, with the sensor installed in the other end of the tubing. If a
factory Exhaust Backpressure sensor is used, you may be able to install a Tee fitting (obtain from your
local automotive supply store) to accommodate this sensor in the same location.
5 Install the new sensor. Pressure sensor threads are ⅛” NPTF.
 Many Emission Control Devices are connected to temperature sensors or switches. Be careful not
to disable these when installing a sensor.
6 If leakage occurs at the sensor, tighten one-quarter turn at a time until leakage stops. If necessary,
thread sealant such as Teflon tape may be used.
 When using a torque wrench, tighten approximately 20nm/15 lb-in. or slightly more, if leakage
occurs. Do not use the body of the sensor to tighten! Use only the hex and the correct wrench. Do
not over tighten!
7   Connect the pressure sensor to the pressure sensor harness by pressing the connector into the
slot.
Figure 3: Pressure sensor and harness.
8  Connect pressure gauge to the ESP. (See ESP instructions for more details on how to do this).
Note: If drilling a mounting hole in a panel to mount this gauge, the hole size should be 2.040”.
9  Secure all wiring so that it does not interfere with moving parts or chafe on sharp edges. This may
be accomplished by routing the wiring within the factory wire harness sheath, using wire ties and
sheathing, and using appropriate grommets when passing through the firewall.