engine misfire in accurate spark in cylinders. on 2000 Ford Escort

Previous owner changed timing belt.The computer codes are saying everything is fine?Is this a faulty coil or back ignition wires?I did not change the wires cause they looked good.Any help would be great at this point.Paul

by in Cornish, ME on February 07, 2013
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1 answer
ANSWER by , February 07, 2013
Get a good battery (not one you need to jump every morning). Low voltage (possible bad battery & or Alternator) can cause rough running with no codes. Can you scan 'live' data while running?