14
Pro-Flo EFI Installation Instructions
©2005 Edelbrock Corporation
Rev. 2/05
Brochure #63-0273
Catalog #3530 & #3531
COOLANT TEMPERATURE SENSOR
The Coolant Temperature Sensor is a thermistor device like the
Manifold Air Temperature sensor. Resistance varies as coolant
temperature rises and lowers. The Coolant Temperature Sensor is
located at the front of the manifold on the passenger side, and is
connected to the Main System Harness..
THROTTLE POSITION SENSOR
The Throttle Position Sensor, an integral part of the Pro-Flo
throttle body, measures throttle angle. This sensor requires
adjustment as described in the SYSTEM START-UP section of
this manual. It is connected to the Main System Harness.
OXYGEN (O
2
) SENSOR
An oxygen sensor, installed on the header collector pipe, measures
exhaust gas oxygen content and is used by the ECU to manage fuel
delivery under closed loop control. Installing the sensor requires
drilling a 1/2-inch hole in the passenger-side header collector. The
sensor threads into the provided fitting which must be professionally
welded into place. The red-lean/green-rich light on the Calibration
Module is also controlled by the O
2
sensor. The O
2
sensor is
connected to the Main System Harness. For installation details, refer
to the FUEL SYSTEM section of this manual.
NOTE:
Prior to installing your O
2
sensor, check the wires leading into
the weather pack plug and make sure the odd colored wire is
in the middle.
