Gasoline Fuel System Related Problems of the 2007 Ford Crown Victoria

Gasoline Fuel System problem

Ford crown vic police interceptor,2007: on two previous occasions, upon depressing brake pedal at stop sign, engine would seem to begin to race; however, after stop I would immediately let off brake to go on through stop sign and engine was normal on acceleration. To-day as I left my parking space I approached an automatic gate to pass through and depressed brake pedal to wait for gate to open and engine began to race to the point that I was unable to hold vehicle back and turned off ignition to avoid hitting gate. A large amount of black smoke resulted from racing engine. After engine shut-down, I shifted to park, started engine and had normal idle. I depressed brake to shift into drive and proceeded through gate in normal manner. The only common system that I am aware of (other than possible electrical/computer) to the fuel control is the vacuum system associated with the brake vacuum booster and whatever vacuum may affect the fuel feed. The foot pedal was definitely in an idle position. I am certain that this engine racing problem is initiated by my applying brakes.