Quick Fuel Technology Qfi Electronic Fuel Injection System - Manual (Page 7)

7

For stock, cast iron manifolds, the location should be just past where the exhaust pipe connects to
the exhaust manifold.

If headers are used, make sure it is about 4-6 inches past the collector pipe
o Install to the exhaust pipe (not into a header tube or the collectors
 VERY IMPORTANT On both stock manifolds and headers, the sensor should be mounted between
the 9 and 3 o’clock position and at least 10° above horizontal (wire side up, sensor tip down). This
prevents condensation, exhaust debris from collecting in the sensor and contaminating it, as well as
possible road damage. Again, always think about placing the sensor where it can be serviced the
most easily.

Drill a 5/8-inch hole in the exhaust pipe

Using stainless steel worm gear clamps OR weld (PREFERRED) the bung in place on the exhaust
downpipe (This may require installation at a welding or muffler shop)

Using an O2 sensor installation wrench, install the oxygen sensor in the bung. Carefully apply anti-
seize compound to the threads before installing, be certain to apply ONLY to the threads, not to the
sensor.

Plug the harness cable from the throttle body into the cable from the Oxygen Sensor. Using cable
ties, keep harness away from the exhaust system and/or moving parts.
See Service Parts list on page 30 should the Oxygen sensor require replacement in the future.