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Cadillac engine repair questions and answers

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  • renata_jd
    renata_jd - 2005 Cadillac STS - Engine - 10/17/2013
    I think I need A Fuel tank press sensor. How much do they cost & how much for a shop repair?
    Car starts but cuts off after I fill the gas tank.
    • Jimm
      10/15/2013 Jimm
      Check the many on-line auto parts sources, such as;,, and - to list only a few sources. For example, they (Rock Auto) list the fuel pressure sensor from around $19.40 for your vehicle (Standard Motor Products part #AS302) or equivalent.
      The fuel pressure sensor is easily replaced, refer to the 'How-To-Guides' feature on the AutoMD website, or the repair help website at - as just two examples.
    • HouseCallAuto
      10/16/2013 HouseCallAuto
      No not the FTPS, replace the Canister Purge Solenoid / Valve. At a shop about $150 to $200
    • Jimm
      10/16/2013 Jimm
      Check the many on-line auto parts sources, such as;,, and - to list only a few sources. For example, they (Rock Auto) list the fuel pressure sensor from around $32.00 for your vehicle (Standard Motor Products part #CP480) or equivalent.
      10/16/2013 HouseCallAuto
      heh jim, where ya been man?
    • hock
      10/17/2013 hock
      Besides the sources advised by other fellow members, you can also consider visiting , as they have million of auto stuffs in their inventory. I too recently bought some engine parts for my Silverado from them and found them quite reasonably priced. If you know basics of DIY's then you can do this by visiting tutorials posted at online tutorials.
      10/17/2013 HouseCallAuto
      hock, I see you have posted several answers promoting a specific web site. One more time and you are banned permanently from AutoMD including your IP addresses and any aliases you create.
  • oleslimm1
    oleslimm1 - 1999 Cadillac Catera - Engine - 10/13/2013
    Why did my 2 new different batteries die while just sitting cold in the driveway i have not had it checked yet
    new dead battery car will not start for the 2nd time .the abs and tc lights are on
    0 answer
  • marilyn.ivory
    marilyn.ivory - 2008 Cadillac STS - Engine - 9/30/2013
    Where is the fuel filter located?
    Can it be a DIY project?
    0 answer
  • gccloudy
    gccloudy - 1992 Cadillac DeVille - Engine - 9/30/2013
    What makes the battery light stay on.
    new alternator installed but light still stays on.
  • mehling
    mehling - 1999 Cadillac DeVille - Engine - 9/28/2013
    Why wont my engine stay running
    My car has 120,000 miles. I replaced the mas air flow sensor,and map sensor. I also replaced the battery and the ignition switch.Evrey time I start my engine it runs very rough, the tack runs all over the scale and then dies. When it dies it starts to run backwards ...
    • HouseCallAuto
      9/28/2013 HouseCallAuto
      Plug in a code reader and read fault codes. That is how things are diagnosed now. Obtain a code reader at amazon for under $20 and read codes. takes one minute, then update this post with the new information and we can continue to assist you.
  • mikebygrace
    mikebygrace - 2004 Cadillac DeVille - Engine - 9/28/2013
    Engine idles rough until it warms up
    motor has 60,000 miles. Idles rough and high until engine warms up. I had spark plugs replaced but problem still persist. Also miss fires on cylinders 3 and 4. odometer unsteady when car is in motion.
    • HouseCallAuto
      9/28/2013 HouseCallAuto
      Check the air intake boot that is located between the intake manifold and the throttle body for a vacuum leak at the bottom. This is the narrow boot not the big one one. Spray some water there or some carb cleaner and if the idle speed changes or becomes more erratic then you know you have a leak there. As the engine warms up the rubber boot becomes bigger from warmth expansion and the leak is sealed up.
  • mikebygrace
    mikebygrace - 2004 Cadillac DeVille - Engine - 9/18/2013
    Car idles rough until engine warms up
    60,000 miles on engine. runs rough until engine warms up. replaced spark plugs but problem persists. Miss fires on cylinders 3 and 4 check engine light stays on
    0 answer
  • ronald
    ronald - 1994 Cadillac DeVille - Engine - 9/17/2013
    4.9 L Cadi, Ignition Problems.Hello I Have a 94 Deville and have a intermittent engine running problem, It may start up
    Hello Feel as though I've Tried Everything. But Mag Pickup in bottom of Distributor still Original ? Could that be it?
    0 answer
  • brs63
    • HouseCallAuto
      9/15/2013 HouseCallAuto
      You have a faulty Body Control Module. Have seen this same situation before. It is located behind the glove box sort of on top of heater box.
  • nhoutexusa2001
    nhoutexusa2001 - 2008 Cadillac Escalade - Engine - 9/15/2013
    How to replace Oxygen Sensor
    78,000 miles Engine light is on Took it to Auto Zone. OEM number to cross: P1133 Definition: Heated Oxygen sensor-Bank 1 Sensor 1 (HO2S11) insufficient switching Explanation: 66ECM has detected the switch ratio of rich to lean 66and lean to rich was below a ...
    • richard5141964
      9/15/2013 richard5141964
      it's close to the exhaust manifold it's screwed into the exhaust might have to heat it up to get it out.that one controls your choke
  • mehling
    mehling - 1999 Cadillac DeVille - Engine - 9/15/2013
    Why wont my engine stay running
    I have replaced my mass air flow sensor, map sensor, battery and ignition switch. When I start my engine it runs very rough,the tack is all over the placethen dies. When it dies it trys to run backwards and pushes air out of the intake. When you try to accelerate it ...
  • 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.