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The engine control module for a quad 4 engine is located under the IDI cover, which is the rectangular, curved piece of metal in the middle top of the engine that fits over the spark plugs. The ECM has the wires connected to it at the edge of the IDI cover. Remove the IDI cover by unscrewing the four bolts that hold it down and lift it straight up. The ECM is attached to the underside of the IDI.
This does not apply to the Iron Duke engine or the V6 engine that they also put in the Calais.
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Location of EC in 89 Le Sabre?
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