Question about 1998 Ford Explorer
ECM (Engine Control Module) is the old name to the new PCM
(Powertrain Control Module) denomination; this unit performs many functions on your car. The module accepts information from various engine sensors and computes the required fuel flow rate necessary to maintain the correct amount of air/fuel ratio throughout the entire engine operational range.
Based on the information that is received and programmed into the PCM's memory, the PCM generates output signals to control relays, actuators and solenoids.
The module is mounted under the hood on the firewall. On 493-94 models, it is mounted low on the firewall, near the left-hand fender (drivers side). On 495-99 models, it is mounted high on the firewall offset to the right-hand side of center.
Exploded view of the firewall PCM mounting for 493-94 models
Exploded view of the firewall PCM mounting for 495-99 models
Hope helps (remember comment and rated this).
Posted on Jul 31, 2010
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Posted on Jan 02, 2017
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