Why is it missing? on 2002 Ford Taurus

Missing on cyl.4&5, code P1633. New plugs and wires. Coil is good.

by in Fairview, OK on March 23, 2013
1 answer
ANSWER by on March 23, 2013
possible fouled spark plug threading. even pin hole can cause issue. possible fouled injectors. run diagnostic to find out for sure.
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