The issue
On certain vehicles, the pulse air reed valve (which permits flow of air from the air cleaner to the exhaust manifold) can fail in cold temperatures, resulting in a backflow of exhaust gas into the air cleaner and fuel induction system that causes a rich air/fuel mixture. This condition could ultimately result in spark plug misfire, or engine stalling.
Transport Canada Vehicle Recalls Database · Contains information licensed under the Open Government Licence – Canada · official text, unchanged
Vehicles covered
| Make and model | Model years |
|---|---|
| Ford FAIRMONT | 1978 |
| Mercury ZEPHYR | 1978 |