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 ?
Have u checkded for a clogged exhaust.
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.
Hook up a gauge so u can see it while driving to check this
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