Why does the engine "choke out" when running the defrost / AC unit?

Tiny
MBATFISH
  • MEMBER
  • 2005 SATURN ION
  • 118,000 MILES
When I run my defrost and drive with rpms over 3.5 my engine does not respond to giving it gas and feels like it chokes itself out. I have to turn off the defrost and put the car in nuetral, then it engages and then runs fine.
Tuesday, December 13th, 2011 AT 2:04 AM

4 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Go to this link for more information: https://www.2carpros.com/articles/engine-hesitates
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Tuesday, December 13th, 2011 AT 2:07 AM
Tiny
SATURNTECH9
  • MECHANIC
  • 30,869 POSTS
So are you running heat set to the windshield?Or the ac when this happens?
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Tuesday, December 13th, 2011 AT 2:08 AM
Tiny
MBATFISH
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  • 2 POSTS
The heat for the winsows.
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Tuesday, December 13th, 2011 AT 2:49 AM
Tiny
SATURNTECH9
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I would have the battery and alternator tested. Also make sure the battery cables are clean and tight. The only thing that makes sense since the only thing that is running is the blower motor with the heat on. Would be a charging issue or the blower motor is stealing a ground from somewhere else.
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Tuesday, December 13th, 2011 AT 2:55 AM

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