Hey Elvin, Crankshaft Position Sensor

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Cadillac Catera and Cimarron Forum Discussion, Hey Elvin, Crankshaft Position Sensor in Past Cadillac Vehicle Discussion; I have a 99 Cat and it will not start once it gets hot, but will after waiting 30 minutes. ...
  1. #1
    juneau69 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Feb 2007

    Hey Elvin, Crankshaft Position Sensor

    I have a 99 Cat and it will not start once it gets hot, but will after waiting 30 minutes. I noticed that you wrote if the car cranks but will not start, it probably is the crankshaft position sensor. I thought from reading somewhere that replacing the CFS would solve my problem. So any ideas what my problem could be? Replacing the CFS seems labor intensive from what I have read on this forum, so if I don't have to, that would be great. Although I am considering wrapping the wire on the CFS with heat wrap. How hard would that be and do you think that will extend the life of the sensor?

    Thanks in advance


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  3. #2
    elvin315's Avatar
    elvin315 is offline Cadillac Owners Connoisseur
    Automobile(s): Platinum 2001 Cadillac Catera Sport
    Join Date
    Jan 2007
    Catskill, NY

    Re: Hey Elvin, Crankshaft Position Sensor

    I'm sorry, what's a CFS? My problem was solved by having the Crankshaft Position Sensor (CPS). Actually it isn't the sensor but its cable.

    It gets superheated by the oil lines, exhaust headers, and cat converters. It turns very brittle and the conductor cracks. The cable expands and the circuit is opened. The cool down period lets the cable shrinks, the broken ends touch and the circuit is closed. The sensor can now tell the ECU when to spray and spark. Eventually that won't work and you'll really be stranded.

    Compared to other repairs it's very easy. The sensor is down by the oil filter and its cable snakes around the engine to an harness connector behind the intake plenum. Open the sticky: Catera Known Issues (98 Catera Crankshaft Position Sensor Replacement - Cranks Won't Start). It'll explain everything.


  4. #3
    Yose is offline Cadillac Owners Member
    Automobile(s): 2001 Catera
    Join Date
    Jul 2008

    Re: Hey Elvin, Crankshaft Position Sensor

    I am by no means a mechanic... Mechanically inclined, yes, but not a mechanic. Even for a novice this entire job only took me two hours. If you can, reroute the wires away from all the hot parts Elvin was talking about.


  5. #4
    Po Pimp is offline Cadillac Owners Fanatic
    Automobile(s): 92' Eldorado, 97 Catera
    Join Date
    Dec 2006

    Re: Hey Elvin, Crankshaft Position Sensor

    Yes you can reroute the wiring. When you are underneath the car beside the CPS you will see an aluminum plate that deflects heat off of the steering assembly. Run the wiring on the inside of this plate. To remove the old one you can simply cut the wiring, remove one torx head that holds the sensor, and just pull all the wiring out. Mine took about 30 minutes to do like this.

    I would suggest using some wire covers for a little extra protection and some wire ties to make sure the wires are secure.

  6. #5
    juneau69 is offline Cadillac Owners Member
    Automobile(s): Cadillac
    Join Date
    Feb 2007
    Thread Starter

    Re: Hey Elvin, Crankshaft Position Sensor

    thanks for responding. Think I will give a try at replacing the sensor.

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