Condition and Correction

CONDITION

A surging condition may occur on some 1982 Toronados equipped with a 5.0L V-8 engine. As the engine temperature gage reaches approximately 220~, and the car is driven at low to moderate speeds, the air/fuel mixture may become lean enough to cause the vehicle to surge.

CORRECTION

Install a new prom, part number 1226377, using the following procedures:

E.C.M. Removal Procedures

1. Remove fastener attaching ECM housing to kick pad.

2. Remove housing and E.C.M. together from kick pad by pulling out lower edge of housing and sliding downward.

3. Remove E.C.M. from housing and disconnect wiring.

PROM Replacement Procedures

1. Remove PROM access cover.

2. Remove PROM and carrier assembly from E.C.M. by pulling upward.

3. Lay the new PROM and carrier on a flat surface so that the pins are pointing upward.

FIGURE 1:

4. Using a narrow, blunt, non-metallic tool, press down on the body of the PROM, on both sides of the retainer bar until the ends of the pins are just below the offset in the carrier (See Fig. 1).

5. Position the PROM carrier into the E.C.M. making sure the carrier notches are aligned with the E.C.M. cutouts.

FIGURE 2:

6. While firmly holding the carrier down, press down firmly on the body of the PROM using a narrow, blunt, non-metallic tool (see Fig. 2). This will seat the PROM into the E.C.M. Take care to insure that the pins do not bend during installation.

7. Reinstall the PROM access cover.
E.C.M. Installation Procedures

1. Reverse the procedures under the previous heading - "E.C.M. Removal Procedures." A system performance check is not necessary for this repair.

Should a surge condition still exist after prom replacement, the following carburetor adjustment will be necessary.