If there is a PVC valve and hose and filter connected to the air intake, oil could be sucked up from the valve covers when the throttle is applied. perhaps the PVC valve needs to be changed.
For a 1999 Mercury Grand Marquis : ( the engine air filter is Motorcraft FA-1668 )
Yes.
no
The cabin air filter, in your 2004 Mercury grand Marquis, is located behind the dashboard on the passenger side. The air filter is directly behind the glove compartment.
99 G/M has no filter.
No. A 2001 Jeep does not have a cabin filter.
That car doesn't have a cabin filter.
Didn't come with one.
According to most aftermarket filter manufacturers and e-catalog data, it appears the 2001 Mercury Grand Marquis does not have a cabin air filter. Just to be sure, might be worth a call to the parts dept. of any Ford-Mercury dealer to verify.
I would say ( No ) I was looking at the 2002 Mercury Grand Marquis Owner Guide and it doesn't show any reference to a cabin air filter
On a 1999 Mercury Grand Marquis : The Mass Air Flow Sensor should be between the engine air filter and the big engine air intake tube
On a 1992 Mercury Grand Marquis : The Mass Air Flow sensor should be between the engine air filter and the big engine air intake tube