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Have a bog down at top speed

Tiny
TIEDYETIMMY
  • MEMBER
  • 1996 CHEVROLET TAHOE
  • 155 MILES
96 Tahoe 350 engine Have a bog down at top speed. Does not bog down while idling or accelerating. Does not bog down while engine has cruise on. Replaced plugs, wires, cap an rotor an seems now to be better but not fixed?

Replaced plugs, wires, rotor and cap. Chug seems to be a bit worse now. Perhaps misfiring?
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Monday, February 20th, 2012 AT 5:14 PM

3 Replies

Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Have u checked for a clogged exhaust or fuel filter?
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Monday, February 20th, 2012 AT 5:41 PM
Tiny
TIEDYETIMMY
  • MEMBER
  • 2 POSTS
Exhaust flow seems normal. It only mis fires when at top speed. Not while idle or when accelerating. Wonder if it may be a fuel issue? It seemed to get worse after the plug, wires, rotor an cap were replaced.
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Monday, February 20th, 2012 AT 5:57 PM
Tiny
CADIEMAN
  • MECHANIC
  • 3,544 POSTS
Hook up a gauge so u can see it while driving to check this
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Monday, February 20th, 2012 AT 7:28 PM

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