Re: 02 Mountaineer V8 Problem
Sounds like a sensor to me. Most sensors are good for a few hours until a long drive. TPS (throttle position sensor), IAC (idle air controller) and even the MAF can affect the vehicle in different ways, such as cutting power, erratic idle even with cruise on going down a flat road, etc. They're all fairly low cost $35-50 each and it's what I would look into first, before buying parts that aren't needed, as these sensors will eventually fail (lifespan of around 70-125K) and replacement will be necessary anyway.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!