Edelbrock Pro-Tuner, User Manual

Page: 55 / 235

Installation and Setup 55
3. Fit the provided fitting into the hole in the exhaust pipe and weld into place.
4. Once it has been welded into place, clean the threads in the center of the fitting. If
your exhaust is coated tap bung threads to ensure a good ground for the 02
sensor.
5. Thread the O2 sensor into the fitting. A high-heat anti- seize compound has been
applied to the sensor threads.
NOTE : The O2 sensor has 18mm x 1.25 spark plug threads.
6. Attach the O2 sensor to the main system harness driver side connector. Refer to
the MAIN SYSTEM HARNESS section of this manual
NOTE : UNLEADED FUEL MUST BE USED ONCE THE O2 SENSOR HAS BEEN
INSTALLED.
COATED HEADERS: Use a digital OHM meter to measure the resistance between
cylinder head bolt and the body of the installed 02 sensor. The reading should be
less than 2 OHMS. If it is more, you need to provide a ground to the 02 sensor
mount.
Wideband (UEGO) Installation
A wideband oxygen sensor is an optional feature which allows very accurate AFR
measurements across a wide range of air/fuel ratios. The appropriate sensor must be
chosen in the setup wizard. With the 48 pin ECM the sensor and conditioning module are
a plug-in installation. To install a wideband/s in the 80 pin PCM controller, follow the
instructions below:
**IMPORTANT**
If you decide to use a single or dual MotoTron or Edelbrock wideband oxygen
sensor (UEGO) with external 0-5V conditioning - instead of the standard heated
switching style (HEGO) with your 80 pin PCM, you must move 2 wires to
different pins in the PCM connector.
While this procedure is straight forward, it is critical that the procedure is followed
exactly to insure proper connection and prevent damage to your wiring harness.
The wideband sensor installs into the exhaust collector exactly the same way as the
standard O2 sensor. The sensor bung should be welded as close to the engine as the
collector allows to insure adequate heat is present at the sensor during idle and light load
conditions.
Connect the conditioning module to the sensor per the kit instructions. Next, the
module’s output needs to be connected to the PCM/ECM. The module plugs into the same
connector/s on the engine harness as the standard switching style oxygen sensor.
For
the 48 pin ECM, no other modifications are necessary.
For the 80 pin PCM however, 2 wires need to be moved in the PCM connector. To move
the wires, follow the steps below:
(NOTE: to unplug the connectors from the ECM/PCM, simply squeeze the connector
releases on each side of the connector to release it from the ECM/PCM and pull straight
out). See Figure 22.