1997 Gmc C1500 Replaced Spark Plugs Wires Rotor Button Cap Etc Still Miss Number

1997 GMC C1500
450,000 MILES
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i replaced spark plugs,wires,rotor button,cap etc and still have a miss in number 5 and 7 after it warms up. works fine when cold. i even had injectors flushed.
Mar 1, 2013 at 1:45 PM
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