Quick Fuel Technology Qfi Electronic Fuel Injection System - Manual (Page 6)

6

Install the vacuum lines
o ALWAYS use new vacuum line and replace each hose, one at a time
o Measure each old hose and cut new hose to that length and install to the proper port on the
throttle body and the vacuum source used by the carburetor
o Repeat for each hose
o Dispose of the old vacuum lines
o Connect the power brake (if equipped) vacuum line to the large 3/8-inch vacuum port on
the rear base of the throttle body.
 If the vehicle requires vacuum for the transmission modulator, connect to this port as
well.
 If both a power brake unit and a transmission modulator is used, install a vacuum T-
connector to accommodate the vacuum lines
 If you are using a vacuum advance distributor,
connect distributor vacuum line to either the upper
(timed) port on rear or on the right side of the
throttle body
o Connect the MAP sensor, located on the bottom of the
QFI ECU box, to the lower port on the rear of the throttle
body. (QFT does not recommend putting a tee in this line
for any other vacuum use.)
o IMPORTANT Be certain to cap all unused vacuum nipples,
using the caps which were installed on the throttle body
Step 2:
Install the Oxygen sensor
If no previous oxygen sensor was used, locate a suitable location to
install the supplied oxygen sensor bung. Install in a position where
the sensor can be easily serviced, if necessary. The sensor must be
placed 20 inches or more away from the cylinder head for proper
operation.

If a catalytic converter is on the vehicle, place the oxygen sensor BETWEEN the engine and the
converter