2001 Mercury Marquis fails to start when I least expect it; why? on 2001 Mercury Grand Marquis

Tried replacing coils. Motor turns over, but will not start. This will happen about every 3 or 4 days.

by in Chickamauga, GA on February 02, 2013
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2 answers
ANSWER by , February 02, 2013
when it doesnt start check for spark and fuel pressure
ANSWER by , February 11, 2013
inspect the crank sensor wiring for any chafed section.And retrieve dtcs.