95 Eldorado 4.6L Engine stalls
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Northstar Engines and System Technical Discussion Discussion, 95 Eldorado 4.6L Engine stalls in Cadillac Engine Technical Discussion; 95 Eldorado. Engine always stalls at idle and no pedal force. Replaced fuel regulator last month. Code is P027C - ...
  1. #1
    Bigdadcad is offline Cadillac Owners Member
    Automobile(s): 95 Eldorado, 2002 Escalade
    Join Date
    Aug 2008
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    95 Eldorado 4.6L Engine stalls

    95 Eldorado. Engine always stalls at idle and no pedal force. Replaced fuel regulator last month. Code is P027C - open throttle signal switch. How can I check the circuit? Is this a five volt circuit? Alternative may be Idle control valve/motor, but no other codes displayed for PCM. Also, throttle valve sticks to throat after sitting off for a minute or more. PCM data shows -.9 degrees throttle position.

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  3. #2
    Ranger's Avatar
    Ranger is online now Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Jun 2004
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    Re: 95 Eldorado 4.6L Engine stalls

    I think your problem is the open throttle switch on the ISC motor. Take it apart and clean the contacts before replacing it. I seem to recall others having luck with it before.

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