Quote:
Originally Posted by tsg1391
the afm shuts down 4 cylinders, then after 9 min(i think) it fires them back up then alternates which cylinders are shut down
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wrong, it is always the same cylinders that are shut down when afm/dod kicks in:
straight from the gm service manual:
To provide maximum fuel economy under light load driving conditions, the engine control module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders 1, 7, 6, and 4, switching to a V4 mode. The engine will operate on 8 cylinders or V8 mode, during engine starting, engine idling, and medium to heavy throttle applications