ISSPRO R17166 - Manual

Form No. IS179 (Rev. G 11/21/2013 )
ISSPRO, INC. • 2515 N.E. Riverside Way • Post Office Box 11177 • Portland, Oregon 97211-1899
503-528-3400 • 800-888-8065 • Fax: 503-528-3495
www.isspro.com © 2008 ISSPRO, Inc. All Rights Reserved.
EXHAUST BACKPRESSURE GAUGE AND
SENSOR INSTALLATION INSTRUCTIONS
1
 Disconnect batteries. Do not reconnect battery power until
system is fully configured to avoid risk of shock or fire.
I C O N K E Y

CAUTION
 Tools may be required

Shown in picture
2
Find a location where exhaust backpressure can be measured without the
sensor exceeding 275° F. This typically requires at least a 24” 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. ISSPRO kit R78855 includes the tubing and necessary
fittings. When tubing is installed, all tubing including coils should be
oriented such that the path is always uphill from the exhaust to the
sensor, with no low spots. The coils of tubing should be oriented
vertically to prevent low spots (which contribute to soot clogging). 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.
3
Install the new sensor. Pressure sensor threads are ⅛” NPTF.
 Many Emission Control Devices are connected to OEM sensors or switches. Be careful not to
disable these when installing a sensor.
4 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!
5
  Connect the pressure sensor to the pressure sensor harness by pressing the connector into
the slot.
Figure 1: Pressure sensor and harness.
6 Route the sensor harness to the intended gauge mounting location, using grommets as appropriate
when passing through the firewall. Connect the sensor harness to the gauge connector as follows:
7
  Trim sensor harness wires to desired length, leaving enough length to allow the gauge to be
pulled from the pod or mounting location without disconnecting the connector.