Hey guys, i just got out my mustang after a long and dreadful winter and i'm having a few problems...any help would be appreciated. I have an 88 gt and when i got it out, my car had a little trouble accelerating and had some backfires. It only backfires when i accelerate fast. I thought it was possibly some bad gas but i used all of that up and ran a tank of premium through it and it still doing the same thing. It also has a little trouble with low idle and sometimes stalls out...i think this is a leak in the vaccum line. Could a vaccum leak also lead to the trouble in accelerating and backfiring? If not any suggestions on what it could be? Thanks a lot i appreciate any help.