Question about Cadillac CTS
What year, make and model?
first thing that comes to mind is the old v-8's with bad camshafts, but that is an assumption I don't want to make without some more information from you, might just be something simple like bad gas
how does it run at highway speed?
does it start normally?
check engine light on?
please update so I can get you some more information
Posted on Apr 27, 2010
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Posted on Jan 02, 2017
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Jan 15, 2013 | 2005 Cadillac CTS
This problem is commonly caused by a dirty automatic idle speed control valve and throttle valve. Buy a can of throttle valve cleaner (do not use carburetor spray cleaner!) from NAPA or Carquest (made by CRC chemicals) and spray it into the air intake while the engine is running, use up about 1/2 the can, engine will try to stall hold the speed up, shut it down and let it soak for 30 minutes, restart and blow out the remaining fluid, shut it down and disconnect the negative battery cable for 5 Min's to reset the base idle control
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