If you experience difficulty starting the engine when cold, stalling at idle, or hesitations during acceleration, it may be the idle air bypass valve. This valve helps the vehicle idle steady when the accelerator pedal is not pressed.
Resources for the Repair and Maintenance of your 1999 Mercury Mystique
1999 Mercury Mystique
1999 Mercury Mystique Problems
The Check Engine Light can illuminate with codes due to the lack of EGR (exhaust gas recirculation) flow caused. This is commonly a result of a clogged passage in the intake manifold. To correct this problem, the EGR valve has to be removed and the passage cleaned thoroughly. Partial restriction of this passage can cause smog test failures for the NOx emissions without causing a drivability symptom.
The hi-amp alternator fuse at the firewall commonly shorts out; the shorted fuse could be mistaken for a bad alternator.
1999 Mercury Mystique Recalls (Recent)
Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES NOT EQUIPPED WITH THE ANTI-LOCK BRAKING SYSTEM (ABS). A PRESSURE CONSCIOUS REDUCING VALVE (PCRV) IN THE REAR BRAKES MAY BE SUBJECT TO CORROSION AND RESULT IN MALFUNCTION, WHEN OPERATED IN AREAS THAT USE SALT COMPOUNDS ON THE ROADWAY FOR DE-ICING OR DUST CONTROL.Learn more »
Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES BUILT WITH AUTOMATIC TRANSMISSIONS WHICH UTILIZE A PARK/LOCK SOLENOID. IT IS POSSIBLE TO ROTATE THE IGNITION KEY TO THE LOCK POSITION AND REMOVE THE KEY WITHOUT THE SHIFT LEVER AND TRANSMISSION BEING IN PARK. THESE VEHICLES DO NOT COMPLY WITH THE REQUIREMENTS OF FMVSS NO. 114, "THEFT PROTECTION."Learn more »
1999 Mercury Mystique Questions and Answers
My 99 mystique takes at LEAST 20 minutes to get started.It has been to the repair shop several times t least 5. Noone seems to know what to do for the problem & cannot find a problem this is ge...
What does code 1131 most likely mean?
My 1999 Mercury Mystique just shuts off while I am driving. If I let it sit for a while, it will restart and run like nothing ever happened. I had the coilpack replaced because my mechenic said tha...
how to change trunk lift support.could be called trunk shock.
99 merc. mystique will start(sometimes just cranks)then if it is shut off it will not restart for as long as 24hrs/will also stall on when driving/rpms will rev up and down/fuel filter changed made...
1999 Mercury Mystique Reviews
The car appear to be in great shape but, everytime I turn around there is something wrong with this car.
Best car I ever had and still have for 5 yrs now and still going strong...
the best running car ever.