Ford Escort ZX2 rough engine idle issue with potential CCRM malfunction on Ford Escort

Some Ford Escort ZX2 owners report experiencing rough engine idle issues, which can manifest as surging RPMs, engine coughing, and intermittent cycling before stabilizing. Common symptoms include rough idling and surging between 500 and 1000 RPMs. These problems may be linked to a malfunctioning Constant Control Relay Module (CCRM), which controls key components such as the engine cooling fan, AC clutch, fuel pump, and powertrain control module, potentially leading to rough idling and no-start conditions. To accurately diagnose the issue, owners are advised to use a diagnostic scan tool to check for codes that may indicate a faulty idle control valve. Additionally, some owners find that problems with the battery or charging system can contribute to engine stumbles and increased load on the engine. It is crucial for owners to consider these factors and seek proper diagnosis to effectively resolve the rough idle issue.