Technical aspects of automobiles

1999 Silverado Stumbles

I have a 1999 Chevy Silverado 4×4 with 64k miles, 5.3 L engine and
automatic tranny.  The truck "stumbles" at different times.  The
problem generally occurs when I first start the engine and put in gear.
  Once I begin to give it more throttle, the problem starts to
dissipate.  During acceleration at low rpm and slight throttle it also
stumbles/bucks. The truck seems low on power in overdrive but when it
kicks down, it seems to be ok.   I have changes plugs and fuel filter.
No trouble codes or check engine light.  The dealer was unable to find
anything wrong…it was working well when I took it in.  Any Ideas?  I
can recreate the problem by holding the brake and throttle, loading the
engine.  Mostly this is noticed under 1500 rpm.

.
posted by admin in Без рубрики and have Comments (4)

4 Responses to “1999 Silverado Stumbles”

  1. admin says:

    "

    <swiede…@win-4-u.net> wrote in message

    news:1151882923.351018.278750@b68g2000cwa.googlegroups.com…

    >I have a 1999 Chevy Silverado 4×4 with 64k miles, 5.3 L engine and
    > automatic tranny.  The truck "stumbles" at different times.  The
    > problem generally occurs when I first start the engine and put in gear.
    >  Once I begin to give it more throttle, the problem starts to
    > dissipate.  During acceleration at low rpm and slight throttle it also
    > stumbles/bucks. The truck seems low on power in overdrive but when it
    > kicks down, it seems to be ok.   I have changes plugs and fuel filter.
    > No trouble codes or check engine light.  The dealer was unable to find
    > anything wrong…it was working well when I took it in.  Any Ideas?  I
    > can recreate the problem by holding the brake and throttle, loading the
    > engine.  Mostly this is noticed under 1500 rpm.

        This recreation surely sounds like bad plugs(worn cam symptoms too, but
    with just 68K??).  But originals should last 100K w/no problem.  And why
    could dealership not find a diagnostic trouble pattern when the problem was
    being recreated?    You DID install a proper set of AC’s didn’t you?  s

  2. admin says:

    I installed Bosch plugs.  The auto parts guy said some folks had
    trouble with the other than AC plugs.

    - Hide quoted text — Show quoted text -

    sdlomi2 wrote:
    > "

    > <swiede…@win-4-u.net> wrote in message
    > news:1151882923.351018.278750@b68g2000cwa.googlegroups.com…
    > >I have a 1999 Chevy Silverado 4×4 with 64k miles, 5.3 L engine and
    > > automatic tranny.  The truck "stumbles" at different times.  The
    > > problem generally occurs when I first start the engine and put in gear.
    > >  Once I begin to give it more throttle, the problem starts to
    > > dissipate.  During acceleration at low rpm and slight throttle it also
    > > stumbles/bucks. The truck seems low on power in overdrive but when it
    > > kicks down, it seems to be ok.   I have changes plugs and fuel filter.
    > > No trouble codes or check engine light.  The dealer was unable to find
    > > anything wrong…it was working well when I took it in.  Any Ideas?  I
    > > can recreate the problem by holding the brake and throttle, loading the
    > > engine.  Mostly this is noticed under 1500 rpm.

    >     This recreation surely sounds like bad plugs(worn cam symptoms too, but
    > with just 68K??).  But originals should last 100K w/no problem.  And why
    > could dealership not find a diagnostic trouble pattern when the problem was
    > being recreated?    You DID install a proper set of AC’s didn’t you?  s

  3. admin says:

    "Scooter" <swiede…@win-4-u.net> wrote in message

    news:1151925671.633949.113290@75g2000cwc.googlegroups.com…

    - Hide quoted text — Show quoted text -

    >I installed Bosch plugs.  The auto parts guy said some folks had
    > trouble with the other than AC plugs.

    > sdlomi2 wrote:
    >> "

    >> <swiede…@win-4-u.net> wrote in message
    >> news:1151882923.351018.278750@b68g2000cwa.googlegroups.com…
    >> >I have a 1999 Chevy Silverado 4×4 with 64k miles, 5.3 L engine and
    >> > automatic tranny.  The truck "stumbles" at different times.  The
    >> > problem generally occurs when I first start the engine and put in gear.
    >> >  Once I begin to give it more throttle, the problem starts to
    >> > dissipate.  During acceleration at low rpm and slight throttle it also
    >> > stumbles/bucks. The truck seems low on power in overdrive but when it
    >> > kicks down, it seems to be ok.   I have changes plugs and fuel filter.
    >> > No trouble codes or check engine light.  The dealer was unable to find
    >> > anything wrong…it was working well when I took it in.  Any Ideas?  I
    >> > can recreate the problem by holding the brake and throttle, loading the
    >> > engine.  Mostly this is noticed under 1500 rpm.

    >>     This recreation surely sounds like bad plugs(worn cam symptoms too,
    >> but
    >> with just 68K??).  But originals should last 100K w/no problem.  And why
    >> could dealership not find a diagnostic trouble pattern when the problem
    >> was
    >> being recreated?    You DID install a proper set of AC’s didn’t you?  s

        Hey Scooter, I know the AC’s are quite expensive (the platinum tip is
    called for, isn’t it?), but often perform significantly better than
    non-AC’s.  HTH, s

  4. admin says:

    - Hide quoted text — Show quoted text -

    sdlomi2 wrote:
    > "Scooter" <swiede…@win-4-u.net> wrote in message
    > news:1151925671.633949.113290@75g2000cwc.googlegroups.com…

    >>I installed Bosch plugs.  The auto parts guy said some folks had
    >>trouble with the other than AC plugs.

    >>sdlomi2 wrote:

    >>>"

    >>><swiede…@win-4-u.net> wrote in message
    >>>news:1151882923.351018.278750@b68g2000cwa.googlegroups.com…

    >>>>I have a 1999 Chevy Silverado 4×4 with 64k miles, 5.3 L engine and
    >>>>automatic tranny.  The truck "stumbles" at different times.  The
    >>>>problem generally occurs when I first start the engine and put in gear.
    >>>> Once I begin to give it more throttle, the problem starts to
    >>>>dissipate.  During acceleration at low rpm and slight throttle it also
    >>>>stumbles/bucks. The truck seems low on power in overdrive but when it
    >>>>kicks down, it seems to be ok.   I have changes plugs and fuel filter.
    >>>>No trouble codes or check engine light.  The dealer was unable to find
    >>>>anything wrong…it was working well when I took it in.  Any Ideas?  I
    >>>>can recreate the problem by holding the brake and throttle, loading the
    >>>>engine.  Mostly this is noticed under 1500 rpm.

    >>>    This recreation surely sounds like bad plugs(worn cam symptoms too,
    >>>but
    >>>with just 68K??).  But originals should last 100K w/no problem.  And why
    >>>could dealership not find a diagnostic trouble pattern when the problem
    >>>was
    >>>being recreated?    You DID install a proper set of AC’s didn’t you?  s

    >     Hey Scooter, I know the AC’s are quite expensive (the platinum tip is
    > called for, isn’t it?), but often perform significantly better than
    > non-AC’s.  HTH, s

    I have had nothing but good luck with the Bosch Supers, but I’ve been
    told that the more expensive Bosch Platinums don’t work well at all,
    especially if fouled.  My info is a couple years old, don’t know if
    they’ve fixed them or not.  I don’t drive any really exotic machinery,
    so the regular Supers are still working for me.

    nate


    replace "fly" with "com" to reply.
    http://home.comcast.net/~njnagel

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