In high dust areas, problems with the EGR system are common. The filter for the EGR solenoid may plug and cause the EGR to activate when it should not; this can cause the engine to stall. The dirty filter should be replaced to correct this concern.Google+
Car Problem Reports
Lincoln Aviator Problems With EGR System are Common in High Dust Areas
Lincoln Aviator Problem
Average Mileage: 98,000 mi (60,000 mi - 147,000 mi)
Visitor, 2003 Lincoln Aviator
At first I sprayed a little lube on the throttle cable & all moving parts of the throttle.
This worked great for 3 weeks.
Replaced the TPS (Throttle Position Sensor)2 prices $25.99 or Fords part for $69.99.
I used the $26 version. Just had to undo 2 screws, switch sensors, screw back on & fixed.
$26 & less than 10 minutes work... Ford dealership wanted to charge $465 plus parts, plus tax?
Visitor, 2003 Lincoln Aviator, 147,000 mi