Rough start
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Cadillac STS Forum - 2005 through 2012 Discussion, Rough start in Past Cadillac Vehicle Discussion; 07 STS 4.6, At first start of the day the caddy is really rough idle for about 20 seconds takes ...
  1. #1
    JAYRAT is offline Cadillac Owners Member
    Automobile(s): 07 STS V8
    Join Date
    Nov 2011
    Location
    NEW MEXICO
    Posts
    49

    Rough start

    07 STS 4.6, At first start of the day the caddy is really rough idle for about 20 seconds takes a few engines cranks to start. No Check Engine Light, rest of the day starting is fine. Have tried injector cleaner, cleaned MAF sensor. Anyone got any experience in this matter or suggestions?

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  3. #2
    1BadCadSTS's Avatar
    1BadCadSTS is offline Cadillac Owners Connoisseur
    Automobile(s): 05 STS4
    Join Date
    Nov 2010
    Posts
    3,637
    Tighten the intake manifold bolts.

  4. #3
    JAYRAT is offline Cadillac Owners Member
    Automobile(s): 07 STS V8
    Join Date
    Nov 2011
    Location
    NEW MEXICO
    Posts
    49

    Re: Rough start

    bolts are tightened, i do check those regularly and i just double checked.

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