Rough Idle stalling in turns, Leaps forward when I stop sometimes. on 2003 Ford Expedition

My Excursion has a Rough Idle. Sometimes when I am stopping It will lunge the SUV forward. I tried to Replace the Brake Booster which was bad but it didn't stop any of the problems. Any idea what the problem could be?

2 answers
Check fuel pressure. Some models of the expedition tend to stall when making a left hand turn and fuel is below 1/4 tank due to faulty fuel pump.
most commonly,vacuum leaks are very notorious for these concerns.get access to a good scan tool to monitor your fuel trims.a positive 15% or above fuel trim usually indicates a pretty good vacuum leak.check your pcv tube attachment at the back of the throttle body.write back after you try this and I will be happy to help.