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KIT BOX CONTENTS
WIDEBAND OXYGEN (O2) SENSOR INSTALLATION PROCEDURE
The O2 sensor must be installed in the exhaust system using the supplied O2 sensor bung from the hardware bag. The O2
sensor is required as it measures the oxygen content of the exhaust gas, which is used by the ECU to manage fuel delivery under
closed loop control.
NOTE: It is suggested that the O2 sensor bung be installed by a professional muffler shop prior to the installation of the ZZ6 EFI
engine. DO NOT drive the vehicle with the O2 sensor unplugged as this will damage the O2 sensor. An O2 sensor bung plug is
provided for your convenience.
Because of harness length constraints, it is highly recommended to install the O2 sensor and the ECU on the same side of the
vehicle.
WARNING: A properly sealed exhaust system is critical for the ZZ6 EFI engine to function properly. Any air leaks in the exhaust
system, upstream of the O2 sensor, will skew the O2 sensor's output resulting in improper calibration which can lead to engine
damage.
Verify that the header and tailpipe gaskets and flanges are in good condition. It is recommended to replace any damaged gaskets
and flanges as they may cause exhaust leaks, which can lead to inaccurate Air Fuel Ratio (AFR) readings. Torque all fasteners to
manufacturer's specifications to avoid any possible exhaust leaks.
WARNING: Be sure any RTV Silicone used to seal the exhaust system is compatible with Oxygen Sensors. This information will
be found on the silicone tube packaging.
WARNING: The Exhaust system must be completely sealed from cylinder head to tailpipe. This is the number one cause of poor
performance as exhaust leaks affect the air/fuel mixture seen by the ECU. Use locking type hardware to secure exhaust headers
to cylinder heads and exhaust collector to mid-pipe. DO NOT USE NYLOC NUTS. Re-torque exhaust hardware on a regular
basis to ensure exhaust leaks do not occur.
The O2 sensor bung must be installed in the exhaust system as close to the engine as possible, after the header collector and
before the catalytic converter (if equipped). This location must be approximately 10° above horizontal and within reach of the O2
sensor harness connector on the engine main harness. NOTE: There must be at least 24" of exhaust pipe after the O2 sensor.
Open headers or "zoomies" will cause the sensor to read incorrectly.
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.
19368171
IR 04MY18
PART NO.
DATE
04MY18
Initial Release - William Philippin
6
SHEET
REVISION
63
OF
AUTH
N/A
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