Accleration while braking.
(unless you have a bad check valve... then it could bleed down quicker)
Last edited by mkosu04; Apr 21, 2009 at 12:09 PM.
This exact thing happened to my buddy with an 04 superduty. Pretty sketchy. It ended up being a bad sensor to his gas pedal. He almost rear ended a cop one time at a light. It took him three trips to the dealer for them to figure it out.


