Question about 2006 Cadillac CTS
The engine warning light came on and the engine started vibrating (running rough). the engine even vibrates (runs rough) when the car is at idle.
It sounds like you may have bad plugs or wires However if they changed the timing chain I would be very concerned that it is doing what your saying, I would suggest you take it to an independent shop that is ASE certified and has the scanners to test it s you don't destroy the engine. Get someone who has nothing to lose, and spend the shop charge to test the engine and if he has to remove timing belt cover and make sure it is not loose. And do not drive 700 miles you will be stranded and the cost to fix it out of town will be more. At that shop tell the guy what was done but don't mention dealer name or any name for that matter keep that to yourself.
Posted on Sep 01, 2009
SOURCE: rough idle after warm up
I'd take a look at the temp sender...the engines computer may be
"thinking" the engine is still cold when it's not. That would cause it
run rich (and rough) after it's warmed up. Generally the sender can be
tested with an ordinary volt/ohmeter but you will need the
specifications available in most inexpensive manuals. As with any
complicated electronics system, I can only give you my best guess,
without the luxury of doing any hands-on testing myself.
Posted on May 28, 2009
I have a 95 eldorado that is starting hard and idling rough. Also noticed gas pedal fluctuating. I have been told it is the Fuel Pressure Regulator. Does that sound reasonable?
Posted on Jul 09, 2010
Did you have battery disconnected or dead recently?
Try to place ignition in run without starting engine for 3 minutes (shut off all accessories and lights etc..). Then shut it off and then start it. Should relearn the idle.
If this doesn't fix the problem, unplug the MAF sensor, if it runs fine with it unplugged, its the MAF sensor.
Exactly what happened on my wife's 01'.
Posted on Jul 25, 2010
Tips for a great answer:
Aug 27, 2018 | 2005 Dodge Magnum
Jan 30, 2013 | Cars & Trucks
Jul 17, 2012 | Cars & Trucks
May 14, 2012 | 2001 Volvo V70
Mar 15, 2012 | 1997 Chevrolet Malibu
Dec 29, 2010 | 2001 Ford Escort ZX2
Dec 01, 2008 | 2002 Volkswagen Passat
2,052 people viewed this question
Usually answered in minutes!