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Cadillac engine repair questions and answers

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  • littlemelvin68
    littlemelvin68 - 2007 Cadillac CTS - Engine - 4/28/2013
    My speedometer shows im going faster than i am. whats the problem
    speedometer shows a much higher speed than im actually going.
     
    • CVO
      4/28/2013 CVO
      The instrument panel clusters logic quit and didn't sent the accurate message to the Odometer Digital Speedometer Reverse gear.
  • rronkis
    rronkis - 2003 Cadillac DeVille - Engine - 4/26/2013
    When I start car everything seems fine,after I drive a while & I come to a stop stop the engine pulses in ilde.
    Drove from Fl started about half way from Fl to NY.Been this way for couple of months
     
  • crlynsaunwms
    crlynsaunwms - 2002 Cadillac Escalade - Engine - 4/24/2013
    What is the code PO174 and CO205
    the truck was scanned.
     
    • HouseCallAuto
      4/24/2013 HouseCallAuto
      Most likely cause for the C0205 is a bad Steering Wheel Position Sensor, dealer only part. The P0174 I suggest you first replace the fuel filter unless you already did that.

      Other Possible Causes

      Check for air leaks in the Air Induction system
      Check for air leaks in the exhaust manifold and in the exhaust pipes
      Fuel control sensor is out of calibration (ECT, IAT or MAF)
      Low fuel pressure (fuel filter clogged, pressure regulator failure)
      HO2S has failed (it may be contaminated with fuel, silicone or water)
      One or more injectors restricted or pressure regulator has failed
      Vacuum hose is disconnected, broken, leaking or loose
  • rylen2209
    rylen2209 - 2008 Cadillac STS - Engine - 4/23/2013
    My car is missing real bad and on the highway it sputters and jerks and lacks the power it had i think it needs a tuneup
    when i give it gas it acts like it doesnt wanna go can this be that the coils are spark plugs need to be changed and how much does this cost
     
    • Jimm
      4/23/2013 Jimm
      First step - have the check engine light or stored fault codes scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' for more assistance.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • Michael Harvey
    Michael Harvey - 1999 Cadillac DeVille - Engine - 4/21/2013
    MY car is drinking 5qts of oil a month?
     
    • Michael Harvey
      4/21/2013 Michael Harvey
      My car is drinking 5qts of oil a month?
      Michael Harvey
      4/21/2013 Michael Harvey
      Why is this happening.
    • HouseCallAuto
      4/21/2013 HouseCallAuto
      If it has no severe external leak (you would be having oil puddles on the ground and oil smoke) then the engine is burning oil. The fix is a new engine.
  • kserre2000
    kserre2000 - 1997 Cadillac DeVille - Engine - 4/21/2013
    WHATS WRONG?????
    when slowing down or idling the engine vibrates the car. already replaced spark plugs and wires. also had fuel injector cleaned. only has 120,023 miles. just started yesterday . mpg went from 25 to 18. check engine light is on, but codes were for new spark plugs and ...
     
    • Jimm
      4/21/2013 Jimm
      First step - have the check engine light or stored fault codes scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific fault code for more assistance.

      Possible Causes of Engine Hesitation or Stumble:

      Dirty fuel injectors (cleaning the injectors often fixes this)
      Dirty air filter (change filter)
      Dirty / clogged fuel filter (change filter)
      Bad MAP (manifold absolute pressure) sensor
      Bad TPS (throttle position) sensor
      Bad or dirty MAF (mass airflow) sensor
      Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
      Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
      Bad gasoline (fuel contaminated with water or too much alcohol)

      Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

      Dirty or worn spark plugs
      Bad plug wires
      Weak ignition coil
      Wet plug wires
  • rich
    rich - 2004 Cadillac SRX - Engine - 4/17/2013
    Engine pinging at times
    Sometimes when taking off from a traffic light I notice a pinging from engine
     
    0 answer
  • dawnkent1031
     
    • HouseCallAuto
      4/12/2013 HouseCallAuto
      You will have to supply more specific detail for any of us to help you with this unknown part...
      HouseCallAuto
      4/12/2013 dawnkent1031
      the part has a hose connected to it, it is on the lower right side of the car, it has 2 plugs that plug into it as in electric plugs and a skinny hose or valve hose on top a motor in the middle and has water that goes in it.
    • HouseCallAuto
      4/12/2013 HouseCallAuto
      Is this the part you are referring to here >> https://www.google.com/search

      That is an auxiliary water pump that is only used on few cars, Catera is one of those few. ACDELCO is the only brand it is available in easiest. The part # for this part is ACDELCO Part # 251-606
  • bob peterson
    bob peterson - 2000 Cadillac DeVille - Engine - 4/12/2013
    Where is the knock sensor located
     
    • Mike
      4/12/2013 Mike
      The Knock sensor is located under the intake manifold.
  • nataliajohnson81
    nataliajohnson81 - 2005 Cadillac STS - Engine - 4/11/2013
    How do you drain the gas tank?
    Accidentally put diesel in the tank from my garage that wasn't labeled. Changed spark plus, fuel filter and need to drain the gas out but can not figure it out.
     
    0 answer
  • purcell375
    purcell375 - 1999 Cadillac DeVille - Engine - 4/10/2013
    Valve num3 is dead . needs valve/job.117,000.rebuild heads or junk it...
    117,000 miles..car is only running on six cylynders..stalls and cuts off.valve num3, is dead. no pressure at all....do i invest or junk it.?have to rebuild heads for a valve job, v-northstar engine
     
    • HouseCallAuto
      4/10/2013 HouseCallAuto
      Do not repair this engine or you will get married to a nightmare.
  • dangger3
    dangger3 - 2005 Cadillac CTS - Engine - 4/9/2013
    Right bank severe misfire
    car runs poorly diagnostics shows misfires on 1 3 and5 cylinders also random misfire melted cat, converter p0301 p0303 p0305 p0300 p018
     
    • Jimm
      4/9/2013 Jimm
      P0300 = Random Cylinder misfires
      For the misfires

      It may mean that one or more of the following has happened:

      Faulty spark plug or wire
      Faulty coil (pack)
      Faulty oxygen sensor(s)
      Faulty fuel injector
      Burned exhaust valve
      Faulty catalytic converter(s)
      Running out of fuel
      Poor compression
      Defective computer
      Possible Solutions

      If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

      If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors

      P0301 = Cylinder #1 Misfire Detected
      P0303 = Cylinder # 3 Misfire Detected
      P0305 = Cylinder # 5 Misfire Detected

      More than likely - given these three cylinders the problem is due to faulty ignition coils or wiring common to these cylinders.
    • HouseCallAuto
      4/9/2013 HouseCallAuto
      This car needs a timing chain replacement and a catalytic converter for Bank one.
  • kendyer62ny
    kendyer62ny - 2000 Cadillac DeVille - Engine - 3/30/2013
    Excessive oil usage 4 qts between changes
    118000 mild valve tap when cold
     
    • HouseCallAuto
      3/30/2013 HouseCallAuto
      The fix is going to be replacing the engine if there is no oil leakage externally.
  • pete
    pete - 1993 Cadillac Allante - Engine - 3/27/2013
    Engine hard starts or no start, runs rough and quits if it does start
    only P012 and p053 and are both current and history, manual says 4x cam reference interrupt or not present. Replaced ICM, problem is same. About to replace PCM as It is part of this 4x ref circuit and I understand is a weak link in this model. Anything else I ...
     
    0 answer