96 Deville 4.6L dies sporadically only at idle
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  • 1 Post By thrasherjen
Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, 96 Deville 4.6L dies sporadically only at idle in Past Cadillac Vehicle Discussion; Car has good idle, no codes set in PCM, but it will die sporadically only during idle. I could be ...
  1. #1
    thrasherjen is offline Cadillac Owners Member
    Automobile(s): 1996 Deville
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    96 Deville 4.6L dies sporadically only at idle

    Car has good idle, no codes set in PCM, but it will die sporadically only during idle. I could be driving the car and stop at a stop sign and then it will die, it will fire back up with no hesitation. I can also let it sit and run and it will eventually just shut off. Doesn't act like it is running out of gas and it starts right back up. I have tried the PCM, ignition module and the crank sensor. If anyone out there has any ideas, please let me know!!!

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  3. #2
    basscatt's Avatar
    basscatt is offline Cadillac Owners 10000+ Posts
    Automobile(s): 89 Coupe DeVille, 95 Sedan DeVille, 03 SLS, two 02 DHS's
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    Re: 96 Deville 4.6L dies sporadically only at idle

    clean the throttle body and Idle Air Contro0l valve

  4. #3
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 96 Deville 4.6L dies sporadically only at idle



    I'll second that. Also pull the DTC's. Post them AND their definitions.

  5. #4
    thrasherjen is offline Cadillac Owners Member
    Automobile(s): 1996 Deville
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    Re: 96 Deville 4.6L dies sporadically only at idle

    Ok, the PCM was not setting any DTC's. I cleaned the IAC and the EGR, same problem. Did a little more research and found that there was a second Crank Sensor (which I originally thought it was the problem), swapped that one out and it has been good ever since, I think I may have solved the problem. Thanks for all your help!!!
    LoveMyLac likes this.

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