motor misfires or misses on 1997 Ford F-150

no codes shown however motor has miss all defected coils replaced. hose on back of intake manifold missing cant find where it goes

by in Milan, TN on May 21, 2011
1 answer
ANSWER by on May 22, 2011
Could it be the PCV hose that goes to a valve cover"
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i have changed plugs, checked coils, replaced dpfs for egr,it does have 225000 miles.does not set any codes, have checked for vacuum leaks, have not found problem yet.ruff idle at all times but run...

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