The problem with low idle and stalling has to do with the TPS Sensor.
My car needed maintenance and a week after that the car has the idle problems. It was maintened at a Mercury/Lincoln dealer.
I have now a other Qualified mechanic and he has checked the whole car.
The last time i got new o2 sensors and a IAC and TPS.
Problems were still there. Alsoo no vacuum leak.
My mechanic said that someone has turned the screw for minimum air (throttle) down.
But now my question: what is the best way to get the throttle back to it's basic position? So the minimum airflow will be good and the TPS sends the right values to the computer.
Mercury Grand Marquis LS HPP 1995
Tires front and rear: Bridgestone 960 A/S Pole Position. Installed: Feb 2007.