My wife's 92 cavalier with a 3.1 will not idle correctly when in gear. It surges really bad and when you come to a stop it will die. It sounds like it has a lifter tick at number 1 cylinder. All my injectors are good. I have good fuel and spark to each cylinder. Does anyone have any ideas for me.

vacuum lines
check them all, for loose unhooked, cracks and all that
its worth a try