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Cadillac engine repair questions and answers

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  • tino
    tino - 2004 Cadillac SRX - Engine - 9/11/2013
    How do I know when my starter is bad
    My car don't start
    • HouseCallAuto
      9/11/2013 HouseCallAuto
      When the starter does not function and you suspect a bad starter, get access to the starter and see if the small wire going to the solenoid gets battery voltage when the key is turned to the crank position. There are only 2 wires at the starter, a small one and a fat one.
  • charley
    charley - 1999 Cadillac Seville - Engine - 9/9/2013
    My car runs rough when first starting then smooths out after a few seconds or if i rev the engine
    to day it stalled while driving at low speeds
    • charley
      9/9/2013 charley
      my car runs rouggh when first starting in the morning for a few seconds then smooths out ir if i rev the engine it smooths out , today it stalled driving at low speeds
  • exodusgary4
    exodusgary4 - 1989 Cadillac DeVille - Engine - 9/9/2013
    Why the radiator fan is not working
    I noticed the engine running not. about, a month ago. I checked to see , if the radiator fan was working. it wasn't. I noticed the radiator fan electrical connection, was on the engine manifold. it was burned. I spiced the two wires. it started working. the car ...
    • Jimm
      9/9/2013 Jimm
      Several possibilities; faulty coolant temperature switch (on the radiator), faulty coolant switch connection or wiring, faulty coolant switch fuse or relay, faulty cooling fan motor.
  • vblair68
    vblair68 - 2003 Cadillac DeVille - Engine - 9/2/2013
    Wont start. Replaced starter and battery, still wont start. when i turnover nothing happens,
    service engine soon lite has been on for couple months.
    • HouseCallAuto
      9/2/2013 HouseCallAuto
      You must plug in a code reader and see what fault codes are stored, especially since this may be caused by a security system fault. This would leave a code stored. This is how this is diagnosed, you start by reading codes. You can read codes on Cadillac without a diagnostic tool by using the push buttons on the information center.
      DTC display; 1998-2004 Seville, 2000-2005 Deville and other models with 3 buttons on the RH side of DIC

      Use the 3 switches located to the right (LH drive cars) of the Driver Information Center (DIC) to activate and respond to the OBD prompts on the DIC.

      ON/OFF = YES
      INFO DOWN or INFO UP = manual toggle

      Ignition ON, acknowledge any warning messages; press ON/OFF and INFO UP together for 2 to 3 seconds. Everything in front of you lights up for 4 or 5 seconds, then you will see:

      Display shows "ALL?"

      Answering YES will display "ALL CODES?"
      Answering YES will run automatic test sequence and display codes, if any. Systems and codes will scroll faster than I am able to read them and write them; not to worry.
      "ALL CLEAR CODES?" will display at the end of the automatic test. If you are satisfied you have the information you need, answer YES to clear/erase all error codes.

      Answering "ALL?" with INFO DOWN will toggle systems test manually in order.
      Answering "ALL?" with INFO UP will toggle system test manually in reverse order.

      Press INFO RESET to reset DIC to "ALL?" to start again.

      Ignition OFF to exit.

      SYSTEMS: (as of 1998)

      ABS (Antilock Brake System)
      AMP (Amplifier)
      DDM (Door Driver Module)
      DIM (Dash Integration Module)
      IPC (Instrument Panel Cluster)
      IPM (Instrument Panel Module)
      IRC (Integrated Radio Module)
      PCM (Powertrain Control Module)
      RFA (Remote Function Actuation)
      RIM (Rear Integration Module)
      SDM (Sensing and Diagnostic Module) Includes airbag crash data. Under RF seat
      VTD (Vehicle Theft Deterrent)
      MSM (Memory Seat Module)
      TTM (Tilt/Telescoping Module)
      RSS (Road Sensing Suspension)

      "History" means that the fault is no longer detected. It will stay in history for 50 ignition cycles then be deleted unless it becomes "Current" again or is cleared manually.

    NOTILOT - 2010 Cadillac SRX - Engine - 9/1/2013
    How to fix cooling fan running indefinitely after engine shut off
    Wife left engine and AC running at idle for extended period. Now cooling fan runs indefinitely. Tried removing fuses. Still runs with fuse 1 (41) removed, does not run with fuse 2 (45) removed. Runs with either or both relays removed. Tried battery disconnect ...
    • John's Auto Repair
      Are you certain that you removed the right relay for the fan? Because with the relay disconnected
      there is no way that the fan should run. The signal for fan comes from the computer, to the relay,
      and the relay engages the fan.
    • HouseCallAuto
      9/1/2013 HouseCallAuto
      Remove KR20D cooling fan high speed relay. This is one of at least 3 that I see for the fan.
  • pflora12
    pflora12 - 1994 Cadillac DeVille - Engine - 8/30/2013
    Why did my jumper cables melt ? I don't drive car many miles & it's in garage. jumping it with my Acclaim .
    I keep it on a battery tender which I've had for a while, but I noticed the battery tender cut out twice. A week ago I jumped it with my Acclaim, no problem. Yesterday I hooked up cables properly, started the Acclaim & suddenly the cables started melting . I got ...
    • CVO
      8/30/2013 CVO
      A damaged positive jumper cable ( broken casing ) may be interfered with the car chassis, caused a shorted circuit and melted the cable.
  • tonjakaiser
    tonjakaiser - 2000 Cadillac Escalade - Engine - 8/2/2013
    SUV will not start some times after 4-14 days it will start like nothing is wrong.
    When trying to start it sounds like ignition coil not on. Checked it and its good. No service engine light coming on. Fuel pump checked to be good. happens about every 2 months each time seems to take longer before starting.
    • frankiedonnn
      8/2/2013 frankiedonnn
      Can you get a scan? It is free at any auto parts store like Auto.Zone Advance Auto.If the P.C.M. has set a code it will make it easier to see what the problem is.
      8/2/2013 tonjakaiser
      We've taken it to Auto Zone and its not showing any codes.
  • tonjakaiser
    tonjakaiser - 2000 Cadillac Escalade - Engine - 8/2/2013
    SUV will not start some times after 4-14 days it will start like nothing is wrong.
    When trying to start it sounds like ignition coil not on. Checked it and its good. No service engine light coming on. Fuel pump checked to be good. happens about every 2 months each time seems to take longer before starting.
    0 answer
  • Steve
    Steve - 1996 Cadillac Eldorado - Engine - 7/26/2013
    Sometimes my car will stall and won't restart until I tighten the battery terninals.
    This has happened 3 times in the last 2 months. Some times the car will restart normally after it stalls.AAA said the battery needed to be replaced. The dealer who sold me the battery said it was okay. He said my car was notoriious for lose terminals.
    • Jimm
      7/26/2013 Jimm
      The loose terminals can be corrected - with or without a new battery. First step - thoroughly clean the battery terminals - especially the threads in the battery case. One tool to use for this purpose would be a stiff bristle wire brush.
      Next, apply just a slight amount (one or two drops) of semi-permanent thread locker to the battery terminal bolts - just enough to prevent vibration from loosening the terminals under normal driving conditions.
  • markerman
    markerman - 1997 Cadillac Eldorado - Engine - 7/24/2013
    What would cause oil to become black and like jello, after 2000 miles.
    would bad oil cause light to blink while ideling.
    • Jimm
      7/24/2013 Jimm
      Sludge is a thickening of the engine oil until it reaches a jelly-like consistency. When the crankcase of your engine starts to accumulate sludge, the thickened oil finds its way into the passages that carry pressurized oil to the engine's bearings and other lubricant-needy parts. Since many of these passages are about the size of a small soda straw and sludgy oil has the consistency of an icy milkshake, the oil flow can become restricted. If that happens, components such as valve lifters soon start wearing rapidly and operating erratically.
      There are several ways for sludge to form in your engine. Water gets into the crankcase through condensation and blowby from the combustion chambers. Water mixed with oil takes on the consistency of thick, pus-colored foam. You'll know it if you see it.

      Fortunately, small quantities of water evaporate from the crankcase as the engine warms up and the oil temperature gets above 212 degrees, which it does after a few minutes on a freeway. However, if you only drive short trips, your crankcase never gets hot enough to evaporate any accumulated water, and in such an engine, sludge formation seems certain in its future.

      Sludge can also form if the oil gets too hot. At temperatures above 250 degrees, nonsynthetic oil starts to oxidize. Such oxidation thickens the oil and produces acidic byproducts. The process accelerates when the oil temperature hits 300 degrees, and the result is something more akin to tar than oil
      7/24/2013 markerman
      I thank you for your time. I did have the oil changed and will again at 1000 miles. I do get a light on at idle oil light just flickers a bit. before the oil change the light and stop engine was coming. It seems to be better now that I put some miles on not much about 120 miles since oil change.
  • Johnny H Rodriguez
    Johnny H Rodriguez - 2006 Cadillac SRX - Engine - 7/22/2013
    Where's the oil filter (2005 Cadillac SRX)
    Can't find it. Need to change the oil Thanks.
  • elainee2000
    elainee2000 - 2007 Cadillac DTS - Engine - 7/17/2013
    No blower
    Air conditioner
    • wbrockstar
      7/17/2013 wbrockstar
      First thing to check is any fuse related to blower motor.Then if possible,run a wire directly to the blower and see if it starts runnin to verify whether the blowers working.If those things pass,look under dash under glovebox for the blower motor resistor which will be bolted to housing.If that passes,its probably in the fan switch on dash
  • mattycaddy613
    mattycaddy613 - 2004 Cadillac CTS - Engine - 7/15/2013
    Hesitations on turns?
    Slightly hesitates around turns
    0 answer
  • sunshineannie37
    sunshineannie37 - 1991 Cadillac DeVille - Engine - 7/15/2013
    Why does my car lose all engine power when pushing the gas pedal after driving for 45 min or more?
    I've had 4 injectors replaces on my car and it didn't act like this. I was told that it could be a coolant sensor because it does it after I've been driving for a while. I was told the cam shaft sensor was replaced 3 yrs. ago but was told today, my car doesn't have ...
    • Jimm
      7/15/2013 Jimm
      First step - have the stored fault codes or check engine light scanned - for free - at any local auto parts store; Advance Auto, Auto Zone, NAPA. Then, post a reply as 'add answer' with the specific code for more assistance. There may be a fault code stored in the OBD memory which may not be displayed as a check engine light.
      For the pre-1995 models the OBD I system was used. The code reader is different for this older system - however most part stores will still have the capability to read and retrieve any stored codes.

      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

      OBD1 Codes Retrieval (Pre-1995 Cars and Trucks)
      GM 1983-95 vehicles OBD1 codes self-retrieval

      As the name implies, you can get the codes for GM cars or trucks yourself if the model of your vehicle is made before 1995, this means as soon as you see “check engine light” in your dash, you can get the code in minutes if you want.

      The connector where you get the GM OBD1 code is usually located under the instrument panel, or under the hood - near the fuse box / power distribution panel.

      When you find the adapter connector, use a jumper wire (see red wire above) and connect terminals A and B. Next turn your key on but don't start. Watch your check engine flash the code/s.

      EXAMPLE: CODE 12: one long flash and two short flashesCODE 13: one long flash and 3 short flashes.

      Note: code 12 is usually the first code you get and just ignore it.Watch the code after code 12, that's what you need.

      GM common codes for OBD1 (for vehicles made before 1995)
      12 System normal
      13 oxygen sensor circuit open
      14 coolant sensor high resistance or shorted
      15 coolant sensor circuit low or open
      16 direct ignition system (DIS) fault in circuit
      17 cam position sensor fault
      18 crank or cam sensor error
      19 crank sensor circuit fault
      21 tps sensor out of range
      22 tps sensor signal voltage low
      23 intake air temp sensor out of range, low
      24 vehicle speed (vss) sensor circuit fault
      25 air temp sensor sensor out of range, high
      26 quad-driver module (computer) circuit #1 fault
      27 quad-driver module (computer) 2nd gear circuit
      28 quad-driver module (computer) circuit #2 fault
      29 quad driver module (computer) 4th gear circuit
      31 cam position sensor fault
      32 egr circuit fault
      33 map sensor signal out of range, high
      34 map sensor signal out of range, low
      35 idle air control sensor circuit fault
      36 ignition system circuit error
      38 brake input circuit fault
      39 clutch input circuit fault
      41 cam sensor circuit fault, igntion control circuit fault
      42 electronic spark timing (EST) circuit grounded
      43 knock sensor
      or electronic spark control circuit fault
      44 oxygen sensor lean exhaust
      45 oxygen sensor rich exhaust
      46 pass-key II circuit or ps.pressure switch circuit fault
      47 pcm-bcm data circuit
      48 misfire diagnosis
      51 calibration error, mem-cal, ecm or eeprom failure
      52 engine oil temperature circuit, low temperature indicated
      53 battery voltage error or egr or pass-key II circuit
      54 egr system failure or fuel pump circuit low voltage
      55 a/d converter error or pcm not grounded or lean fuel or frounded reference voltage
      56 quad-driver module #2 circuit
      57 boost control problem
      58 vehicle anti-theft system fuel enable circuit
      61 a/c system performance or degraded oxygen sensor signal
      62 engine oil temperature high temperature indicated
      63 oxygen sensor right side circuit open or map sensor out of range
      64 oxygen sensor right side lean exhaust indicated
      65 oxygen sensor right side rich exhaust indicated
      66 a/c pressure sensor circuit low pressure
      67 a/c pressure sensor circuit or a/c clutch circuit failure
      68 a/c compressor relay circuit failure
      69 a/c clutch circuit head pressure high
      70 a/c refrigerant pressure circuit high
      71 a/c evaporator temperature sensor circuit low
      72 gear selector switch circuit
      73 a/c evaporator temperature circuit high
      75 digital egr #1 solenoid error
      76 digital egr #2 solenoid error
      77 digital egr #3 solenoid error
      79 vehicle speed sensor (vss) circuit signal high
      80 vehicle speed sensor (vss) circuit signal low
      81 brake input circuit fault
      82 ignition control (IC) 3X signal error
      85 prom error
      86 analog/dig
  • elainee2000
    elainee2000 - 2007 Cadillac DTS - Engine - 7/13/2013
    Knocking sound when running
    Engine makes a knocking sound when running
    • wbrockstar
      7/13/2013 wbrockstar
      Has the noise just recently started.Does the oil pressure get really low when at a stop at idle?If so the knock is usually comin from the main/rod bearings having excessive clearance from miles/age of vehicle.It could also be coming from a wrist pin or piston slap between cylinder wall and piston.How many miles