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Home >> GMC >> 1989 >> Magnavan 7.4 N, 400/M40 >> Repair and Diagnosis (Single Page) >> Engine Performance >> Theory and Operation >> CCC Theory/Operation >> Operation >> Data Sensors >> "E" Cell Timer Module
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"E" Cell Timer Module

This device is used only on 2.8L engines. It is located next to the ECM. The "E" cell timer module is a cold start modifier programmer. It provides an added enrichment signal to the ECM for about 4 seconds during cold starts. After a specific number of operating hours, this device is no longer required and becomes inoperative.