hello,
Im new here .
well, i left my 98 mustang GT sitting on my yard for like a week, without me touching it or anything. today i went to take it for a ride and when I crancked it it missfire and it was shaking really bad!.. before i left it on the yard for like a week ran fine.. what could it be? please help!

 

Is the check engine light on? If so check codes and advise. Will it run run long enough to get good and hot? May just be a moisture problem. Start it and let it run and see if it clears out. Good Luck....... Welcome!