Question about 2005 Cadillac CTS
The slight shaking is at idle only and is intermittent. It runs great once you get going.
I have a 2001 Cadillac DTS with the exact same problem. Nobody including the dealer could figure out what was wrong. I replaced all the coils and the problem stopped happening for a while. Eventually I sold the car for parts. Feh! Very disappointed in Cadillac.
Posted on Jan 16, 2013
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Posted on Jan 02, 2017
SOURCE: check engine soon light comes
CHECK OIL LEVEL! ALSO CHECK FOR CLOGGED AIR FILTER! ALSO COULD BE BAD FUEL FILTER! AUTOZONE CAN RUN AN OBD-II CHECK FOR YOU, AND SEE IF A CODE SHOWS UP! THEY ARE THERE TO HELP YOU!
Posted on Feb 20, 2011
Fuse box is behind the soft panel under your steering wheel. Is your check engine light flashing or on? Would be a misfire causing the rough idle if it is flashing. A possible bad coil. If its just a shake with no check engine light then it could just be a motor mount.
Posted on Jul 31, 2010
E13: right bank O2 sensor, no data
F48: low refrigerant level in A/C system
Neither of these is likely to cause rough idle, but I would change the sensor.
If that cure it, great.
If not, make sure the vacuum hose on the fuel pressure regulator (at end of fuel rail) is tight at both ends and not cracked or leaking. Then pull the vacuum hose off the regulator and see if there is any fuel in the vacuum hose. If yes, replace regulator.
I also recommend cleaning up the intake side of engine with carb cleaner or equivalent: throttle body, Mass airflow sensor, EGR system, and PCV valve. Make sure EGR valve is operating.
If you have questions, please let me know.
fuel press reg:
Posted on Oct 24, 2010
Go to an auto parts store, they will scan your OBD II memory for the check engine light code. And from ther they should tell you why it`s on, and what needs to be fixed and/or replaced.
I recomend advanced auto parts.
Posted on Apr 18, 2011
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