So I bought my 2013 Ford St about 2.5 months ago from Nissan. 3rd day of owning it I was getting all the symptoms of the wire harness issue. The stalling, multiple codes getting thrown, the no hill assist. I called Ford and went to the service dept in person and they handed me a printout that the harness was repaired when the previous owner brought it in for the recall.and I had to pay almost $400 for a diagnostic alone. Long story short, I took it to a shop near me and showed them when I squeezed the harness the idle changed. Being abad at soldering I had them fix it and this is what they found. Each wire was twisted then all four twisted together and heat shrunk. No solder. They told me the other splice they cut out had the wires loose and sliding out. No wonder me squeezing the harness improved performance for a few days. Ford sucks.
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