Mercury Repair Questions? Ask a Mechanic for Answers ASAP
Welcome, I'm Chris (aka Moose).
These codes on this engine normally point to a vacuum leak at the intake gaskets, PCV hose, valve cover gaskets, or air intake after the MAF sensor. If it is a large leak you na find those with flammable brake or carb cleaner. Spray short bursts around everything under vacuum, if it revs up that means you sprayed a leak.
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