MEFI Fuel Injection
8.1L Second Generation Ignition Coil
The second generation of ignition coils sit on red valve covers and the wire to the plug connects to the top of the coil (towards the center of the block). These 2 sets of ignition coils and valve covers are not interchangeable. The ECM software between the two systems are also incompatible. All 8.1L long blocks come with these new style coils. If the engine being replaced has the first generation coils, then the ECM will need to have new software installed to correctly operate the new style coils. If this software is not installed, the engine will not run properly.
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