2002 Eldorado rough idle
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Northstar Engines and System Technical Discussion Discussion, 2002 Eldorado rough idle in Cadillac Engine Discussion; My 02' Eldorado just started idling a little rough. It only had 55K. Do you think it could need plugs ...
  1. #1
    nascartamike's Avatar
    nascartamike is offline Cadillac Owners Member
    Automobile(s): 2002 Eldorado ETC
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    2002 Eldorado rough idle

    My 02' Eldorado just started idling a little rough. It only had 55K. Do you think it could need plugs and wires this soon? There are no engine codes.


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  3. #2
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: 2002 Eldorado rough idle

    Ripped plenum?

  4. #3
    Submariner409's Avatar
    Submariner409 is offline Cadillac Owners Member
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    Re: 2002 Eldorado rough idle

    No wires - My '02 has 53K and is dead smooth.

    Start by checking the air filter, intake ducting, and the connector plenum between the throttlebody and intake manifold - the rubber thingy with the hose clamp around it - not the intake ducting, the intake side of the throttlebody - shoot a tad of choke or throttlebody cleaner down at the bottom of the rubber connector with the engine idling. Any leak there will show up as an idle speed increase.

    Here's what's inside/under your coil packs................click the pic

  5. #4
    nascartamike's Avatar
    nascartamike is offline Cadillac Owners Member
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    Thread Starter

    Re: 2002 Eldorado rough idle

    Thanks. I will check tomorrow morning and let you know. What should the idle speed be? 800, 900, 1000 rpm?

  6. #5
    Skiller.'s Avatar
    Skiller. is offline Cadillac Owners Connoisseur
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    Re: 2002 Eldorado rough idle

    650. Just below the 3rd hash mark (750).

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