Question about Cadillac CTS

1 Answer

My cadillac is not idling properly. It is missing alot

Posted by on

  • 2 more comments 
  • lil_sheik Apr 27, 2010

    Thanks. It starts fine, idle fine after you atart it, but after a while the the check Engine light comes on (flashing), then stays on for the time that the car is running. It drives fine at high speed and you cannot feel the vibration but when u slow down oor comes to a stop, you would feel and hear it miss fire.

  • lil_sheik Apr 27, 2010

    its a cadillac cts 2004.

  • lil_sheik Apr 27, 2010

    NO...I have not changed the oil in about 8 months or so. But would that caussse the check engine light to come on?

  • lil_sheik Apr 28, 2010

    The Scan reading was P0300, P0302 and P0305. The Mechanic said that it was misfiring from those three. He disconnected the wires leading to the sparks plug and reconnected them and ran the scan again. Then it read that iwas misfiring from 1 & 5 only....So he said that he does not think its the Coils...The funny thing is before the car started misfiring, a couple times before that in the night while i ws driving it. I heard a sound on the right side of the vehicle, as if someone had hit it and it was happening a few times before i the care started to give problems. I was wondering it that was probably a sign that something was wrong with a particular part. So i got up this morning and i startes the engine..It still was misfiring and i checked the side where i heard the nose coming from and saw that the filter and pump is on that side. I am really concerned about my Vehicle because i am living in the Caribbean and my Cadillac is the only one on the Island. Thanks



1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,297 Answers

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

  • 1 more comment 
  • Sean Reisdorf
    Sean Reisdorf Apr 27, 2010

    sounds like you have a vacuum leak

    have you had the oil change recently and did they inspect the air filter

    funny don't put that cover on just right and you get you exact problem

  • Sean Reisdorf
    Sean Reisdorf Apr 27, 2010

    check engine light comes on for many reasons including emission relationships
    it will flash when it sees emission output 1.5x greater than allowable by the EPA

    lets find the root cause by getting the codes stored in the PCM

    do you have a scan tool?
    if not, take your car to your local retail parts store and tell them your check engine light is on
    when they scan the computer make sure you record all codes stored!
    do not forget to ask for the freeze frame data too!

  • Sean Reisdorf
    Sean Reisdorf Apr 28, 2010

    with the new information you have provided I am going to stick with my first guess and say you are dealing with a fuel trim issue

    no weather it is fuel, spark or air related will be determined on the next test

    using a scan tool
    access the fuel trim data and tell me at what percent long and short term fuel trims are for each bank and we'll go from there



1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.

Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

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

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.

Jan 15, 2013 | 2005 Cadillac CTS

1 Answer

High idle, and engine misses

could be a spark plug or plug boot, depending on the last time they were replace i would recommend replacing them all.

Nov 19, 2012 | 1994 Toyota Pickup

1 Answer

1992 Cadillac Deville ideals really slow and miss's when I step on the throttle

Do this frist and then if the miss is still there have the spark plugs and plug wires replaced.

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

Aug 07, 2012 | 1991 Cadillac DeVille

1 Answer

Cadalliac 1991 Fleetwood 4.9 v8

Hows the A/c cooling? F46 is a a/c refrigerent problem.. If its at the right level, it could cause the a/c compressor to rapidly turn on and off, causing a surge feeling.

Apr 29, 2010 | 1991 Cadillac DeVille

1 Answer

Motor missing when idleing new plugs wires cap rotor coil

were they gapped properly? Alot of people are under the impression that plugs come pre gapped for the application. They do not. Also check all the vacuum lines to see if they are on good-may have gotten disturbed when the work was going on. Also check the connections for the plug wires to make sure they are tight.

Mar 24, 2010 | 1999 Ford Super Duty F 450

1 Answer

1998 cadillac sls what happens when the coolent reservoir running in idle popps a hole in it .

get a new coolant bottle or you will have massive coolant loss and do alot of damage to the engine

Mar 14, 2010 | 1998 Cadillac Seville

1 Answer

Hi my 80 petrol has miss runs rogh at idle

try changing the spark plugs and wires on a engine that old. cap rotor, and carb cleaner. on something that old you could be looking at alot of different things.

Aug 29, 2009 | Toyota Land Cruiser Cars & Trucks

2 Answers

How do i fix idle on 99 cadillac catera

if it is a north star it probably needs intake manifold replaced

Jul 08, 2009 | 1999 Cadillac Catera

1 Answer

Locate O2 Sensors in 1994 Cadillac ElDorado

o2 will not make your car do that you have other issues check for secondary ignition miss or primary ignition miss sounds like you are dropping a cylinder dumping raw fuel to contaminate 02 sensor find the real problem to fix your light

Nov 22, 2008 | 1994 Cadillac Eldorado

Not finding what you are looking for?
Cars & Trucks Logo

Related Topics:

31 people viewed this question

Ask a Question

Usually answered in minutes!

Top Cadillac Experts


Level 3 Expert

79851 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22326 Answers

Ronny Bennett Sr.
Ronny Bennett Sr.

Level 3 Expert

6927 Answers

Are you a Cadillac Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides