Engine -Surge During Road Loads

Article No:
81-15-10

July 15, 1981

Subject:
SURGE DURING ROAD LOADS AND CROWDS

Model:
1981 ESCORT AND 1982 EXP WITH AUTOMATIC TRANSMISSION AND AIR CONDITIONING
1981 LYNX AND 1982 LN7 WITH AUTOMATIC TRANSMISSION AND AIR CONDITIONING

Calibrations: 1-04C/R-13A or R-14A
1-04X/R-13A or R-14A
1-04Q/R-11A or R-12A
49 STATES ONLY

WARNING:
THIS MODIFICATION IS AUTHORIZED ONLY FOR THE LISTED ENGINES. PERFORMING THIS MODIFICATION ON OTHER ENGINES IS UNAUTHORIZED AND COULD CREATE LIABILITY UNDER APPLICABLE FEDERAL OR LOCAL LAWS.

In the event of engine surge during road loads or crowd conditions, use the following procedure. The spark strategy currently is to switch the distributor vacuum from spark port to EGR port, when the air conditioning is on. This revision maintains spark port to the distributor, venting the vacuum line at idle.









1. Locate the vacuum solenoid mounted to dash panel above bracket master cylinder (Figure 15).

2. Disconnect rubber tubing (attached to the yellow tubing) from the top port of the vacuum solenoid and cap (380614-S) the open port of the vacuum solenoid (Figure 15).

3. Disconnect the connector block from the same vacuum solenoid and (using side cutters or similar tool) separate the connector block (white tubing from the black tubing) (Figure 15).

4. Install the 3-way tee (373846-S) into the open end of the sectioned connector block (attached to the black tubing). Connect the rubber tubing (attached to the yellow tubing) to the 3-way tee (Figure 15).

5. Add a piece of 5/32" rubber tubing (DOPZ-12226-B) (1.5" long x 5/32" distributor vacuum) to the 3-way tee and connect to the middle port of the vacuum solenoid (Figure 15).









6. Disconnect and discard the piece of the sectioned connector and in-line connector block (attached to the white tubing) and install a 90° elbow adaptor (387980-S) into the rubber tubing and connect a piece of 7/32" rubber tubing (D8PZ-12226-A) (1 4" long x 7/32 distributor vacuum) between the 90° elbow and the "VAC" port of the thermactor idle vent valve (l.V.V.) (D6DZ-9G328-A) per the vacuum schematic (Figure 13, also see Figures 15 and 16).

7. Connect a piece of 5/32 rubber tubing (D0PZ- 1 2226-B) to the bottom port of the vacuum solenoid and the open port of the I.V.V. per the vacuum schematic (Figure 15).

8. Attach a bundling strap (95874-S) to retain the white tubing (near the 1.5" long rubber tubing) to the yellow tubing near the vacuum solenoid (Figure 15).

9. Attach a bundling strap (95873-S) to secure the 1 4" x 7/32" vacuum hose (from Step 6) to fuel bowl vent hose (Figure 16).

10. Verify vacuum hose routing per Figure 13.





11. Obtain an Authorized Modifications decal and list the date, dealer number and alterations performed as shown below. Select a prominent place adjacent to the Vehicle Emission Control Information decal suitable for installing the Authorized Modifications decal. Clean the area, install the decal and cover it with a clear plastic decal shield.





WARRANTY STATUS: Reimbursable within the provisions of the Warranty and Policy Manual.

OPERATION: SP-9328-A-8 1

TIME: 0.6 Hr.

DLR. CODING: Basic Part No. DRIVE - Code: H8