1998 Honda Civic Repair Question
Mileage: 17,555 miles.
Honda Civic Random misfire Problem
Honda does not supply a diagnostic flow chart for this code. P1399 is a random misfire code and Honda/Acura has reported for various models that this could be caused by clogged EGR ports. In addition there is the possibility that the valve clearance specification may be out of range.
check this as well as plugs/wires
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