Question about 2005 Cadillac CTS

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Engine misses at idle only, check engine light goes on and off

The slight shaking is at idle only and is intermittent. It runs great once you get going.

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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

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Breed1956
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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

  • 35 Answers

SOURCE: needs fuse box location and car idles rough

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

jturcotte
  • 8531 Answers

SOURCE: Please help: 1992 Cadillac Deville:

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.

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fuel press reg:

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Posted on Oct 24, 2010

  • 77 Answers

SOURCE: Engine was running slightly rough

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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Car shaking at idle, no engine check light


Sounds to me that you have a cylinder miss fire. Chrysler products generally set a code when a miss fire is detected. Does the shaking go away under a load (while driving) ? If the miss is always there I would focus on the ignition system and look for any vacuum leaks around the intake manifold area .

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There is no way ANYONE can tell you if your engine shaking problem is related to ANYTHING until the cause of the shaking has been PROPERLY DIAGNOSED.

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Needs fuse box location and car idles rough


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.

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2000 chrysler cirrus problems


I have the same problem with great shaking while stopped idling, but no engine light. It is worse when cold and worse when in gear. I have a 1999 Cirrus with the 2.4L engine. It works great and there are no error codes. What I have discovered is that there is something called a flex plate that goes between the torque converter and flywheel and it was cracked. It must be easy to access to inspect (more work to repair though) as the garage didn't charge me for the diagnosis. They said that the crankshaft rear seal was also pushing out. You can do both at the same time once you get it apart.

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1 Answer

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Sounds like a bad vacuum leak. Check all the engine vacuum hoses, make sure none are broken/cracked/disconnected/missing.

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