kewl., the unmotorcraft part seemed wrong. the alt should read abit higher during morning starts. mine drains abit at night. once warm its center+. i hope the pull a part is cool. also, check and clean your neg battery cable with baking soda and wire brush. make sure its secure at is ground.

the engine and brain switch back and forth from the alt and batt while driving. a bad ground at the batt can cause erratic behavior. it's also why a weak amp bad will make a vehichile run poorly after being jumped. the computer need a certain amount of amps to run right. it sure can't hurt to clean and check your batt. cables.

good luck. keep us informed. i feel that one should always use motorcraft or the most expensive napa version of a part.