3.6L: Stumble/lag on initial throttle tip-in
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V6: 3.0, 3.2 LA3, 3.6 LY7, 3.6 DI LLT Discussion, 3.6L: Stumble/lag on initial throttle tip-in in Cadillac Engine Technical Discussion; I started to notice an intermittent stumble, lag on initial accleration (throttle tip-in) in 6th gear 2 weeks ago. Now ...
  1. #1
    schnack is offline Cadillac Owners Member
    Automobile(s): Cadillac
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    3.6L: Stumble/lag on initial throttle tip-in

    I started to notice an intermittent stumble, lag on initial accleration (throttle tip-in) in 6th gear 2 weeks ago. Now it has occurred in at least one other gear, here's some maintainence history:

    2005, 3.6L 6 speed, 78k miles

    -Replaced under warranty at 49,700 miles: Timing chains, clutch and shift linkage bushings, driveshaft

    -Cadillac serviced at 71k, Fuel injector system cleaned due to 2,4,6 misfire.
    replaced by self, air filter

    Next steps i'm considering - flush diff, trans. fluid., have dealer re-check for misfire(s).

    Any suggestions?

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  3. #2
    Spyke's Avatar
    Spyke is offline Cadillac Owners Connoisseur
    Automobile(s): 2005 Cadillac CTS 3.6L VVT
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    Re: 3.6L: Stumble/lag on initial throttle tip-in

    have you clean the maf sensor yet?

  4. #3
    briggy's Avatar
    briggy is offline Cadillac Owners Enthusiast
    Automobile(s): CTS 3.6L 2005 80,000 Miles
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    Re: 3.6L: Stumble/lag on initial throttle tip-in

    are you getting any codes ?

  5. #4
    webbnr432 is offline Cadillac Owners Member
    Automobile(s): 2005 CTS 3.6
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    Re: 3.6L: Stumble/lag on initial throttle tip-in

    having same problem on my 2005 3.6 with 79k aswell mine is an automatic n e suggestions on where to start to look for the problem??

  6. #5
    gterrell is offline Cadillac Owners Member
    Automobile(s): 2005 CTS, 3.6 LY7
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    Re: 3.6L: Stumble/lag on initial throttle tip-in

    I'm having a similar issue with my 2005 CTS, 3.6. I had a misfire on cylinder 2, changed all plugs and cleared codes. The engine runs great under load but stumbles intermittently at idle and has no fault codes. I can't hear any whistling or sucking noises as if the intake manifold were leaking BUT since the problem occurred after having to remove it I have to assume it's that or a vacuum line. What all should I check before taking it to a shop?

  7. #6
    gterrell is offline Cadillac Owners Member
    Automobile(s): 2005 CTS, 3.6 LY7
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    Re: 3.6L: Stumble/lag on initial throttle tip-in

    I cleaned the MAF sensor as mentioned above....problem solved.

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