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2009 Impala LT 3500 Flex Fuel - helping out a friend. Symptoms - car would start, run for anywhere from 10-30 seconds, then die. ECU RAM error indicated via OBD II port reader - sent ECU out to get reprogrammed.
Reinstalled ECU (also called ECM, I believe - Engine Control Module), now getting Starting Disabled, Service Throttle - replaced throttle. The last time the car was idling, it sounded like a bearing was going out (making noise). Now the vehicle starter is "pulsing" - engages for 1/4 second, then disengages, engages for a 1/4 second, then disengages, etc..... I'm a bit at whits end - tried taking the tension off the tensioner - same symptoms with the starter.
 
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