The sound is called moosing. It's usually an indication that either the IAC valve (Idle Air Control) valve or a sensor is going bad.
this is an easy fix. the problem is the iacv. just ask for that part at dealer change it out and the problem is fix.
On a 2001 Mercury Cougar : The Mass Air Flow Sensor is between the engine air filter and the big engine air intake tube
The IAT sensor on a 2000 Mercury Cougar V6 is on the back side of the filter box. On the Zetec model it is either on the Air box like the V6, or on the intake tubing running from the box to the Throttle Body.
your air filter is cologged, since it cannaot get an adequate air supply through the air filter it creats a suction thus sucing oil through the crankcase breather which is located in the intake, after the air filter
The IACV on a '99 Mercury Cougar V6 is on the top right of the Upper intake manifold, there is a hose leading from the intake tubing to the IACV. On the I4 Zetec Cougar, I am not sure where the IACV is, though I believe it is on the side of the throttle body.
an intake air temperature sensor is a sensor that is used to measure the temperature of the air that flows through your intake manifold into your engine.it is usually posisioned on the intake filter housing.
The Chevy Cavalier does have a fresh air intake filter. The fresh air intake filter is located behind the passenger side kick plate.
A hypercharger is an air intake cover on a motorcycle, which ducts air through a butterfly opening and over an air filter into the intake of the engine. The most popular one is made by Kuryakyn.
If this is a '99 through '02 Cougar, this sounds like the so called "Moosing" problem, which is a problem with the Idle Air Control Valve (IACV), and is fixed by taking the IACV out, its connected to the upper intake manifold, and either cleaning it thoroughly, or replacing it.
intake air filter for the motor is in the intake filter housing, passenger side of the engine bay, has hook clips you need to release to get to the filter element
The filter intake is the outlet that is at a higher point than the other. There are two outlet ports on an above ground pool, there is a hgh one and there is a lower one. It is the higher one that is the intake for the filter system.
In the valley under the upper intake.