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Mark the drilling location on the exhaust system pipe with a permanent or paint marker. Check the proposed mounting location
to ensure the clearance for the O2 sensor is adequate and that the O2 sensor connector on the main harness will reach the O2
sensor location. Make sure to take engine movement into consideration when checking for clearance.
Drill a 5/8" hole at your mounting location. Deburr and clean the hole as needed.
Fit the provided bung onto the hole opening. Secure the bung with a clamp and weld the bung in place.
Once the installation of the bung is complete, make sure to clean the threads of the fitting to ensure it's free of debris.
NOTE: The O2 sensor bung uses an M18 x 1.5 thread pitch.
ECU, Wiring Harness and Fuel System Installation
Find a suitable mounting location for the ECU. This should be on the same side of the vehicle as the 02 sensor. Recommended
mounting locations are the fender well, inner fender panel or inside the vehicle on the passenger side kick panel. Be sure the O2
sensor connection reaches the main harness connector.
NOTE: It is recommended to mount the ECU in a location away from excess heat, vibration and possible water exposure.
Using the supplied sheet metal screws from hardware bag, mount the ECU to the desired mounting location.
Find a suitable harness route in the engine compartment which leads to the ECU location. Connect the main harness to the ECU.
TIP: For most installations, the harness fits best if routed from the rear of the engine back towards the firewall, across the firewall,
then forward towards the ECU location.
Connect the Injector/ Sensor harness the corresponding sensors and injectors labeled on the harness. Connect the large
connector to the main engine harness.
Connect the Coil/ IAC harness to the ignition coil, distributor and IAC valve on the throttle body. Connect the large connector to
the main engine harness.
NOTE: Avoid routing the harness near any ignition related components (ignition coil, distributor, spark plug wires). Also avoid
routing near the headers, sharp edges, or any tight radius corners that may damage the harness.
Route the power and ground leads on the main harness towards the battery. Connect the RED POWER lead (+12 Volt) and the
BLACK GROUND (-) lead to the appropriate battery terminals. If necessary, the power and ground leads may be extended to
reach the battery. However, the use of 12 gauge wire or larger is required.
WARNING: All power and ground leads must connect directly to the battery. DO NOT RUN POWER TO THE STARTER OR
GROUND TO ENGINE BLOCK OR CHASSIS!
Securely mount the Fuse Holders and the Main Relay in an accessible location.
Connect the Pink/Black IGN switched wire on the main harness to a +12 Volt switched power source that provides +12 Volts when
the key is both "ON" and "CRANKING".
NOTE: It is critical that the switched +12 Volts to the IGN switch wire is constant during cranking. This is a common issue on
vehicles with no start or hard to start issues. Do not connect this to the positive side of the coil.
Secure the harness and leads with tie wraps from the hardware bag. Avoid over tensioning wire ties as this may damage the
harness.
Chevrolet Performance Parts ZZ6 EFI Deluxe Engine
TITLE
ALL INFORMATION WITHIN ABOVE BORDER TO BE PRINTED EXACTLY AS SHOWN ON 8 1/2 x 11
WHITE 16 POUND BOND PAPER. PRINT ON BOTH SIDES, EXCLUDING TEMPLATES.
TO BE UNITIZED IN ACCORDANCE WITH GM SPECIFICATIONS.
02 Sensor Threaded Fitting
Exhaust Pipe
19368171
IR 04MY18
PART NO.
DATE
04MY18
Initial Release - William Philippin
7
SHEET
REVISION
63
OF
AUTH
N/A
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