on the back of the block behind the intake
check fuses & brake lights switch located on brake pedal
It's right after the airfilter box
right behind the air filter toward the engine
were is the iac locate on a 1999 mercury mystique
According to the 1998 Mercury Mystique Owner Guide : ( 61.5 litres / 16.2 U.S. gallons )
The fog light switch on the 98 Mystique is on the headlight switch. When you turn on the headlights, pull the switch towards and the fog lights should come on. Here is a link to the owners manual for the 98 Mystique http://www.analogstereo.com/pdf/om/mystique_owners_manual_1998.pdf
the library should have a shop manual for this vehicle, you can make copies of the right sections :)
yes
No , coil pack
That should be OBD 2
Replacing ERG Valves in a 1998 Mercury Mystique is fairly hard because it requires great precision to avoid blocking the EGR passage.
I don't think so.