The transmission is slipping on my 98 Crown Vic. Usually slips from 2nd into 3rd. Am at 95k original miles on it. Also, it will sometimes stall out while idling. Have replaced fuel filter. Also having an issue with neutral safety switch (need to place car in neutral in order to be able to start and shift into gear). Should I change my ****** fluid and filter, or are those stories about not changing high-mileage ****** fluid true?
Change the filter and fluid. This car if the transmission is original should have a torque converter drain. Drain the torque converter also,it gets almost all the fluid out of the transmission. Doing this the car will require almost 12 quarts of fluid. Worth a shot. I change mine at 25000 mile intervals.
SOURCE: 2007 crown vic 4.6 l idles high on startup
This sounds like a normal condition.What happens is the cold start emission reduction component monitor(software program in the computer) is running.
Cold Start Emission Reduction Component Monitor
The Cold Start Emission Reduction Component Monitor was introduced for the 2006 MY on vehicles that meet the
LEV-II emission standards. The monitor works by validating the operation of the components of the system
required to achieve the cold start emission reduction strategy, namely retarded spark timing and elevated idle
airflow.
When the CSER strategy is enabled, the idle air control system will request a higher idle rpm, elevating engine
airflow. While this CSER elevated airflow is requested, the low airflow test compares the measured idle airflow from
the MAF sensor to the commanded idle airflow from the idle air control strategy.
SOURCE: 1988 Ford Crown Vic Strange Idle
When you turn the key on does the check engine light come on? If not it may be burned out. It sounds like a MAP sensor or an O2 sensor is bad. I would suggest taking it to autozone as they do free diagnostic and seeing if a code comes up. If it is a sensor it should, if not it may be the idle sensor not reading right in the ECU. More than likely it is one of the sensors though.
SOURCE: 1985 Ford Crown Vic won't shift sometimes. Seems
Have he transmission drained and the screens cleaned
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So apparently it thought my abbreviations for "transmission" was vulgar. Heh. It's "change my transmission fluid" and "high-mileage transmission fluid".
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