Topaz L4-140 2.3L HSC (1984)
MODIFYING THE EMISSIONS CONTROL SYSTEM
NOTE:
REFER TO THE ABOVE SCHEMATIC DRAWING AND MATCH THE NUMBERED STEPS WITH THE FOLLOWING NUMBERED
STEPS.
Replacing a Vacuum Delay Valve
1.
Replace the existing, (#40, red/black), Vacuum Delay Valve (VDV) in the hose at the air control side of the combination air control and air bypass
valve with new, (#5 white/black) valve (Part Number E3AZ-12A091-E). Assure that the "black" side of the delay valve is positioned toward the
vacuum source.
Installing a Thermactor Idle Vacuum Valve
2.
Install a Thermactor Idle Valve (TIV). Find the double 5/32" manifold vacuum fitting below the carburetor in the intake manifold. Follow the hose
without the check-valve to where it meets the plastic vacuum harness connector.
3.
Cut the hose 2-inches back from the connector and install 3-way vacuum TEE connector (Part Number 383008-S) using the two 3/16" ports.
Attach 12-inches of 7/32" vacuum hose, (Part Number D0PZ-12226-C) to the 1/4" port. Connect the open end of the 7/32" hose to the 7/32" port
of the TIV, (Part Number D6DZ-9G328-A).
4.
Attach 4-inches of 5/32" vacuum hose (Part Number D0PZ-12226-B) to the 5/32" port of the TIV.
Locate the vacuum hose leading to the air bypass side of the combination air control and air bypass valve. Follow the hose past a vacuum TEE to a
yellow in-line restrictor with the end capped.
Cut the hose 2-inches back from the restrictor and install a 3-way vacuum TEE connector, (Part Number 373846-S).
Attach the open end of the 5/32" hose from the TIV to the open port of the TEE connector.
Rerouting the TK, TAB and TAD Solenoid Valve Vacuum Lines
5.
Remove the existing TEE (3-3/16" ports) from the top port of the TAD solenoid valve and disconnect the plastic black vacuum line and black
rubber hose attached to the TEE.
6.
Remove the existing 90~ elbow and hose from the bottom port of the TAB solenoid valve.