2005 Subaru Legacy Support Question
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Question posted by Noble on December 4th, 2010
Legacy Won't Rev Over 2000 Revs After Jump Start
2004 Legacy Turbo was started using jumper leads now will not rev past 2000 revs
Requests for more information
Request from bobblehead199 on December 9th, 2010 11:06 AM
Are there any check engine lights on? Does the cruise control flash ever?
Are there any check engine lights on? Does the cruise control flash ever?
Current Answers
Answer #1: Posted by Noble on December 12th, 2010 6:12 PM
Problem is now resolved. Apparently when jump starting with jumper leads it is important to let the engine of the 'host' car idle with the jumper leads connected for 10 to 15 minutes before attempting to start the 'subject' vehicle.
Reason is that if the car is started with the battery below 6 volts of chanrge then the ECU trips into safe mode which limits revs to below 2000. Service technician was able to reboot the ECU and the engine ran as normal.
Reason is that if the car is started with the battery below 6 volts of chanrge then the ECU trips into safe mode which limits revs to below 2000. Service technician was able to reboot the ECU and the engine ran as normal.
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