my 2002 Grand Marquis is running rough, sometimes does not accelerate, and the AC switches from cold air to warm air

Asked by GuruTTY16 Jun 19, 2018 at 04:01 PM about the 2002 Mercury Grand Marquis LS Premium

Question type: Maintenance & Repair

could this be a vacuum line?  where are my vacuum lines on the 2002 marquis

1 Answer

F_O_R answered 5 years ago

Is the check engine light on? My first guess is bad spark plugs or coils. Yes there are vacuum lines, they all connect to the intake manifold.

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