HAC Installation Procedure

Begin With This Procedure If EBCV Was Installed Previously under Campaign 88C30 And owner Is Experiencing DRIVEABILITY Concerns.





Notice:
The purpose of this procedure is to install an additional HAC to work in conjunction with existing HAC and HAC bracket - Figure 17 shows both HAC's as finally installed).





1. Remove EBCV bracket bolt (not to be reused) and install new HAC bracket with new bolt and new washer provided in kit as shown in Figure 12.





2. Remove vacuum hose from existing HAC to 3-way connector and plug HAC port using plug provided in kit (Figure 13).

3. Loosen band and remove vacuum hose from existing HAC to vacuum pipe (Figure 13).





4. Install two (2) new plugs and new 150 mm hose from kit to new HAC from kit (Figure 14 shows installation positions).





5. Install 3 new vacuum hoses from kit (120 mm, 150 mm and 250 mm) to new 3-way connector from kit (Figure 15 shows proper placement of each hose).





6. Connect hose assembly from step 5 to existing HAC and vacuum pipe as shown in Figure 16 (connect 120 mm hose to existing HAC and connect 250 mm hose to vacuum pipe).

7. Carefully tighten band around wires and vacuum hose. Do not overtighten band around hoses (Figure 16).

8. Install new HAC (with 150 mm vacuum hose still attached) to bracket (Figure 17).

9. Connect loose vacuum hose from new HAC to existing 3-way connector (from EBCV).

10. Connect remaining loose vacuum hose from new 3-way connector to remaining open port on new HAC (Figure 17).

11. Check all hose connections.

12. For automatic transmission vehicles repairs are complete, install Campaign Identification Label.

For manual transmission vehicles continue to "Idle Mixture Procedure".