3X reference pulses were not detected by PCM during cranking. - FirebirdV6.com/CamaroV6.com Message Board

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  • 3X reference pulses were not detected by PCM during cranking.

    just pulled that code from my car today, not sure how long its been there, i havnt checked my codes in a while, recently the car has been idling at around 2000

    i thought it was a clogged up IAC valve, but i cleaned the IAC out today and it still did the same thing, any thoughts?

    the code sounds like a bad crank position sensor, but that shouldnt cause a high idle would it?
    -Aaron, AKA ATL2001<br />93 3.4L <br /><a href=\"http://www.ilfba.com\" target=\"_blank\">www.ilfba.com</a>

  • #2
    From Chilton
    The 3X Crankshaft Position (CKP) sensor provides a signal to the PCM through the ignition control module. The PCM uses this signal to determine RPM and crankshaft position.

    I don't know about the 3.4, but the CPS was a pain in the *** to change in my 3.8.

    [ February 18, 2004, 10:41 PM: Message edited by: C.O.Jones ]
    <a href=\"http://members.cox.net/95batmobile/d86f.jpg\" target=\"_blank\">Sinister Six</a> <br /><b><a href=\"http://www.cardomain.com/id/c_o_jones\" target=\"_blank\">Cardomain</a></b><br />--This doesn\'t change the fact that I am ~The Guru~ who still kicks puppies...

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