Mercury E43Z-12A297-A Module - Ignition

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Pull the right side of the module down the distributor mounting flange and back up to disengage the module terminal from the connector in the distributor base. The module may be pulled toward the flange and away from the distributor.

For the Duraspark stator assembly on V8 engines, remove the negative battery cable, distributor cap, rotor, distributor connector from the wiring harness, and cap adjuster. Use a gear puller to remove the armature from the sleeve and plate assembly, and then remove the E-clip retaining the diaphragm rod to the stator assembly. Remove the ground strap screw, wire retaining clip, and lift the stator assembly off the lower plate assembly. Clean the lower plate assembly if it will be reused and install the stator assembly, armature, and other components in reverse order.

Attach the wiring harness connector(s) to the ICM.

The caution is that the ignition module is a delicate and relatively expensive electronic component, and improper procedures could lead to damage to the module or other electronic devices.

Before replacing ignition system components, check with your dealer service department to see if your vehicle qualifies for a Federally mandated extended warranty of 5 years or 50,000 miles. For vehicles with Electronic Engine Control (EEC), be aware that disconnecting the battery may cause the Powertrain Control Module (PCM) to lose its memory, resulting in abnormal driving symptoms for the first 10 miles or so until the PCM relearns its adaptive strategy.To replace the Duraspark ignition coil, disconnect the negative battery cable, mark the wires at the coil using coded tape, remove the coil-to-distributor high-tension lead, disconnect the connections at the coil, and remove the retaining bolts holding the coil bracket. Then, remove the coil from the bracket and install the new coil, applying a thin layer of silicone grease to the inside of the coil-to-distributor high-tension lead boot during reinstallation.For the Duraspark ignition module, detach the cable from the negative battery terminal, unplug the module connectors (depending on whether it's the standard or universal module), remove the mounting screws, and then install the new module.For the Duraspark stator assembly on V8 engines, remove the negative battery cable, distributor cap, rotor, distributor connector from the wiring harness, and cap adjuster. Use a gear puller to remove the armature from the sleeve and plate assembly, and then remove the E-clip retaining the diaphragm rod to the stator assembly. Remove the ground strap screw, wire retaining clip, and lift the stator assembly off the lower plate assembly. Clean the lower plate assembly if it will be reused and install the stator assembly, armature, and other components in reverse order.For V6 engines, the process is similar but includes additional steps to remove the lower plate assembly and stator assembly from the distributor base.To replace the TFI-IV ignition coil, locate the coil assembly, unplug the electrical connector and coil wire, remove the retaining screws, and detach the coil. Then, install the new coil, making sure to apply a thin coat of silicone dielectric grease to the inside of the coil-to-distributor high-tension lead boot.For the TFI-IV ignition control module (distributor-mounted or remote-mounted), follow the specified steps for removal and installation. Apply silicone dielectric grease to the back of the module before installing it.To replace the TFI-IV or DI distributor stator (PIP sensor), remove the distributor cap and wires, then follow the specific steps for removal and installation of the stator assembly, distributor shaft, and other components. Check for wear or damage and replace any faulty parts as needed.Make sure to follow the instructions carefully and ensure that the correct parts are used for each component replacement.

The ignition control module is a delicate and relatively expensive electronic component, and improper procedures could lead to damage to the module or other electronic devices, including the EEC-IV microprocessor. Check with your dealer about the Federally mandated extended warranty on devices under computer control before attempting to diagnose and replace the module yourself. Note that certain models use a special DuraSpark II ignition control module with altitude compensation features for spark timing and engine performance at high altitudes. An intermittent no-start condition may occur in some years and models of SSI and DuraSpark ignition systems, where the engine starts momentarily and shuts down instantly or runs the duration of a trip but won't restart afterward. Striking the module or applying heat won't fix it, confirming the ignition control module as defective. To check the ignition control module on DuraSpark systems, examine power to the module, resistance of the distributor stator, and ground circuit continuity. For TFI-IV ignition control modules, inspect power, resistance between terminals, and the PIP to SPOUT circuit. Always ensure safety measures when working with the ignition system. For ignition control module replacement, detach the negative battery cable, unplug electrical connectors, remove mounting screws, and replace the module or stator. Reassemble components following the reverse order of removal and use appropriate lubrication or dielectric grease when specified.

The caution is that the ignition module is a delicate and relatively expensive electronic component, and improper procedures could lead to damage to the module or other electronic devices.

The ignition control module is a delicate and relatively expensive electronic component. Failure to follow the procedures could result in damage to the module or other electronic devices, including the EEC-IV microprocessor itself. Additionally, all devices under computer control are protected by a Federally mandated extended warranty. Check with your dealer before attempting to replace them yourself. Duraspark I and II ignition control module: Detach the cable from the negative terminal of the battery. Vehicles equipped with a Duraspark I or II system may have either the standard Duraspark I or II module or the universal ignition control module. If your vehicle is equipped with the standard module, unplug both connectors; if your vehicle is equipped with the UIM module, unplug all three connectors. Remove the mounting screws and detach the module. Installation is the reverse of removal. TFI-IV ignition control module: Remove the distributor from the engine if access to the module is blocked. Remove the two module mounting screws with a 1/4-inch drive 7/32-inch deep socket. Pull straight down on the module to disconnect the spade connectors from the stator connector. Whether you are installing the old module or a new one, wipe the back side of the module clean with a soft, clean rag and apply a film of silicone dielectric grease to the backside of the module. Installation is the reverse of removal. When plugging in the module, make sure that the three terminals are inserted all the way into the stator connector. Disconnect the negative cable from the battery. Disconnect the electrical connector from the EDIS ignition control module. Remove the screws securing the EDIS module to the lower intake manifold. Installation is the reverse of the removal procedure. Prior to installing the EDIS module onto the manifold, apply about a 1/32-inch of silicone dielectric compound to the mounting surface of the module.