Re: 4.6 L cold am weather wont start Grand Marquis 06
You have electronic fuel injection, you shouldn't have to touch the pedal. Have you checked for codes? I'm wondering if it's an issue with the MAF, by pushing the pedal, you're opening the throttle body and allowing a higher air flow past it. Along with checking for codes, try cleaning the sensor and see if it improves.
Chewing on asphalt and drinking dinosaur wine