4.6, 1999 Crown Victoria P71. Idle drops very low when coming to a stop, backing up or under alternator load increase. I recently replaced the alternator and battery, and today replaced Idle Air Control Valve. Problem is not solved.
I "KAM'd" the car (dropped battery for 30 min) and have not yet driven the car more than 100 yards. Could the EGR or throttle position sensor be faulty?
THANKS from Las Cruces, New Mexico, USA