Car Stall problems of the 2015 Ford Mustang

The contact owns a 2015 Ford Mustang. The contact stated that the vehicle would stall out multiple times soon after start up as the engine and service tire mobility kit warning lights would appear on the instrument panel. The contact also stated that white smoke would intermittently emit from the rear exhaust pipe while driving at high rates of speed. She also stated that the same warning light would appear on the instrument panel. The contact took the vehicle to an independent mechanic where he diagnosed the vehicle with a defective fuel tank pressure sensor. The contact then called henry curtis Ford(1120 auto center dr, petaluma, CA 94952) where they informed her that the vehicle was no longer under warranty or on recall. The contact was then offered a diagnostic fee which she decline. The manufacturer was also notified of the failure and gave her the same information as the dealer;they offered no further assistance. The vehicle had yet to be repaired. The failure mileage was approximately 90,000.

First occurrence (mid December 2014): I was coming up to a red light and the turn was slightly uphill. I approach the light and drop the car into neutral (clutch was fully engaged continuously at this point) and while braking, as I approached the red light to make a right turn my car's rpms just drop completely to 0. It didn't even try to catch idle. This was about 1. 5 months ago. I figured that it might be something with the tune I'm running so I called up bama and had them send me a fresh tune after explaining what had happened. Also, not sure if this helps or is relevant information but I had been driving on the highway for about 40 min before that and did a pull on the highway 2 min before the car died. Second occurrence (2/25/2015): today while driving to work in the morning I was switching lanes and as I merged into the lane I engage the clutch fully and was braking to adjust to the speed of the vehicle in front of me and was preparing to downshift into gear, but before I could downshift the rpms keep dropping and go past normal idle and drop to 0 again without even trying to catch idle again. So I quickly start it back up again and it drove fine after that. This can become a safety issue if not taken seriously. More and more Mustang owners are experiencing this problem and I had to switch dealerships because the dealership where I bought the car from refuses to work on my car since it is lowered. Ford racing offers lowering springs for the vehicle which is a Ford part. If someone was to have these springs installed and the car was lowered with Ford parts does that mean the dealership will refuse to work on it if it doesn't fit on their lifts then as well? I have reported other issues as well which Ford has claimed to be normal just because it is occurring on other vehicles as well. The csm at Ford motor company has been a huge help so thank you for that.