Question about Cadillac CTS

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Car isn't starting all the time. Fuel pump has enough pressure and new fuel filter. If Yoou use ether it will start and stay running. after abouth 3 or 4 times it won't start again. new battery was just put in.

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  • alaric Jul 24, 2008

    we ran injector clean through the fuel.

  • alaric Jul 24, 2008

    car has had new spark plugs has about 20,000 miles

  • alaric Jul 24, 2008

    has spark plugs with 20,000 miles.

  • alaric Jul 24, 2008

    we put new sparks plugs in 20,000 miles.

  • alaric Jul 24, 2008

    Engine light doesn;t come on and we put a new relay switch in.

  • alaric Jul 24, 2008

    engine light doesn't come on and has a new relay switch put in

  • alaric Jul 24, 2008

    Engine light doesn't come on and we put a new realy switch in.

  • alaric Jul 30, 2008

    car is dyeing while runing down the road

  • Anonymous Mar 24, 2014

    new fuel pump
    new fuel filter
    new fuel pump relay
    the car went to the shop and read a bad pcm code i fixed the battery cable end and it was fine for a few hours now it wont start

  • Anonymous Mar 24, 2014

    fuel pump fuse and relay are ok.veh was running ok and stallednveh turns over but no start

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I have experienced this problem before. It is one of the most frustrating problems I have ever experienced. I finally came to the conclusion that it was an electronic issue and we started looking at the car's main computer. Sometimes the computer will not trigger the check engine light when the problem is actually the computer itself. It is an expensive thing to replace but I was glad I did it.

Good luck,

CH

Posted on Jul 30, 2008

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Well seems like you must have weak spark check the module on your distribuator or the crank angle senser and check your timing

Posted on Jul 24, 2008

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Check if this model has a start injector on it. A start injector is a small injector located on the throttle body that basically primes the system for starting. If you have one and it has malfunctioned, this could be your problem.

Posted on Jul 24, 2008

  • Ryan Rogers
    Ryan Rogers Jul 30, 2008

    I'm going to suggest taking it to a shop for diagnosing. I have an STS and it has so many electronic features and safeguards that make it almost impossible to work on yourself. Your CTS is new, so I'm sure that there are more electronic devices on this model.

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Hello,
Does your "Check Engine" light come on? Also, if you have the radio off, when you insert the key into the ignition and put it "Accessory" do you hear a "click" or a minor movement in the back seat area?..

Posted on Jul 24, 2008

  • Natesan Sabesan
    Natesan Sabesan Jul 24, 2008

    OKie then try the following test

    Fuel pump test:



    1. Get yourself a helper.



    2. remove the gas cap.



    3. have one person listen in the gas tank at the gas cap opening.



    4. have the other person turn the ignition switch to the ON position
    ONLY so as the dash lights come on. Do NOT attempt to start the engine.



    5. As soon as the ignition key is turned to the ON position, The person
    at the gas tank should hear the fuel pump run for TWO SECONDS and then
    it should STOP.



    6. Does it ?.





    If you do NOT hear it run, in most cases the fault is the fuel pump relay or the fuel pump


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Sounds like a problem with injectors or with ECU controlling the electronic injection.

Posted on Jul 24, 2008

  • Ginko
    Ginko Jul 24, 2008

    Check first the spark plugs, check if they are burnt with oil and eventually replace them. See if you can hear the motor going on 3 cylinders, distribution can also be one of the causes.

    If some of the injectors is obstructed or dirty you can get this kind of problems. Often similar problems are also caused by something wrong wioth the ECU (computer) that controls fuel injection. The only way to test the ECU is connecting it to a scanner and getting diagnostic error codes in return. You can only do this at a garage.

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