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1993 Blazer Vortex running rich & ruff

Old July 15th, 2012, 5:48 AM
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Default 1993 Blazer Vortex running rich & ruff

Hi I have 93 4.3 voetex that is still running ruff and rich after I replaced the plugs, rotor,, cap wires air filter.. It had a bad skip before I did the tune up I check the MAP sensor I unplug it an it ran rely ruff. Has any one else have this problem. Thanks
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