The Check Engine Light can illuminate with codes due to the lack of EGR (exhaust gas recirculation) flow caused by the intake manifold passage plugging up with carbon and oil. 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.
Resources for the Repair and Maintenance of your 1999 Mercury Cougar
1999 Mercury Cougar
1999 Mercury Cougar 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 intake and valve cover gaskets may leak oil.
If the vehicle hesitates or idles roughly after being parked for twenty to thirty minutes, with the engine still warmed to normal operating temperature, you may need to reprogram the PCM (powertrain control module) with new calibration.
1999 Mercury Cougar Recalls (Recent)
Summary: VEHICLE DESCRIPTION: PASSENGER VEHICLES. THE DOOR LATCH MAY HAVE BEEN MANUFACTURED WITH A LATCH PAWL THAT HAS A COATING WHICH WILL SWELL IN HIGH HUMIDITY CONDITIONS. THE LATCH PAWL MAY THEN STICK IN THE OPEN OR UNLATCHED POSITION.Learn more »
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. THE ACCELERATOR CABLE MAY HAVE BEEN MANUFACTURED WITH A BURR ON OR NEAR THE END OF THE CABLE SLEEVE INTERIOR. THIS BURR COULD FRAY THE CORE WIRE RESULTING IN THE ACCELERATOR NOT RETURNING TO IDLE WHEN THE ACCELERATOR IS RELEASED.Learn more »
Summary: ON CERTAIN MY 1996-1998 PASSENGER VEHICLES BUILT AT THE KANSAS CITY, CUAUTITLAN ASSEMBLY PLANTS OR ON MY 1999 PASSENGER VEHCLES BUILT AT THE AUTOMOTIVE ALLIANCE INTERNATIONAL ASSEMBLY PLANTS, THE ROUGH SURFACE OF THE HEATER BLOWER RESISTOR'S STAINLESS STEEL BLADES CAN DAMAGE THE COPPER SURFACE OF THE WIRING HARNESS CONNECTOR. THE DAMAGE COULD, OVER TIME, CAUSE INCREASED RESISTANCE IN THE CONNECTOR AND, DUE TO SUBSEQUENT TERMINAL RELAXATION, RESULT IN AN OPEN CIRCUIT CONDITION.Learn more »
1999 Mercury Cougar Questions and Answers
I cleaned out the ports to the egr and replaced the egr and light still came back on. What else could it be?
i have very little heat but the blower is not pushing out the hot air what can it be
I've replaced the starter, and the key ignition switch. I occasionally hear a grinding noise when I turn the key to start the car - about 1 out of every 25 starts. Usually happens while car ...
If my check engine light is on and keeps reading "O2 sensor circiut malfuction" even after changing the sensor could it be the lack of EGR(exhaust gas recirculation) which is a "comm...
1999 Mercury Cougar Reviews
I love my car but more for it's looks than it's dependability. Since I've bought my car 2 yrs ago, I have had the transmission rebuilt, , the electrical wiring is all shorting out, the blower stopped working for heat and air, electrical short. The power windows only work sometimes- electrical short. The tail lights were shorting out also. Now, it's running hot, the cable wire to open the hood has stretched out and no longer opens properly. This car is a money pit!