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Q: Car stalling on 2005 Mercury Monterey

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
Car stalls while driving....usually happens around 55mph on hgwy......notice it happens mostly when going up hill or incline. EGR has been replaced...latest read out cited 3rd cylinder. idle's fine
(1) Answer
A proper engine diagnostic must be performed by a qualified tech. Cylinder 3 misfire is not consistent with stalling. There's more to the story than is easily read at this point.