Mechanics

96 350 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 "CHUG" JUST A BIT WORSE AT TOP SPEED. CAN YOU GIVE ME ANY

1996 Chevrolet Tahoe • 155 miles

Replaced plugs, wires, rotor and cap. Chug seems to be a bit worse now. Perhaps mis firing?
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Tiedyetimmy
February 20, 2012.



Have u checkded for a clogged exhaust.

Cadieman
Feb 20, 2012.
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.

Tiny
Tiedyetimmy
Feb 20, 2012.
Hook up a gauge so u can see it while driving to check this

Cadieman
Feb 20, 2012.