ISSPRO R82255 User Manual
Page 2
Form No. IS148 (Rev. A 03/11/2008
)
ISSPRO, INC.
2515 N.E. Riverside Way
Post Office Box 11177
Portland, Oregon 97211-1899
503-288-4488
800-888-8065
Fax: 503-249-2999
www.isspro.com
© 2008 ISSPRO, Inc. All Rights Reserved.
4
Find the factory Injection Control Pressure (ICP) sensor and disconnect its harness connector. On
7.3L engines, The ICP sensor should be mounted into the driver's side head near the fuel bowl, in the
"V" portion of the engine. On 6.0L engines, it is on the passenger's side valve cover.
5
Route the ISSPRO HPOP Harness up to the ICP sensor. One end of the ISSPRO HPOP Harness
will have a connector similar to the one you just unplugged from the ICP sensor. Plug this connector
into the ICP sensor, and plug the truck harness connector (which you disconnected in step #4) into
the remaining connection on the HPOP harness.
The ICP sensor is critical to engine operation. If wire insulation is damaged and sensor wires
shorted out, engine damage can result. Retain and protect all wiring.
6
If installing other items that connect to the ICP sensor (such as a power adding module), connect the
ISSPRO HPOP Harness directly to the ICP sensor, then connect the power module's harness between
the ISSPRO harness and the truck harness. If using a purely resistive load to modify the output of the
ICP sensor (known commonly as a "10K Mod"), the ISSPRO HPOP gauge will display the same
modified (incorrect) output that the PCM is seeing. If a true HPOP reading is desired while using a
10K Mod, install a second ICP sensor on the engine, and connect it to the ISSPRO ESP using
ISSPRO harness P/N 9CAA607405 instead of the ISSPRO HPOP harness included with the gauge.
7
Connect HPOP 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 the gauge, the hole size should be 2.040".
8
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.