问:燃油系统问题——今天早上蓝烟,检查引擎灯和关闭,发动机振动

几周前,我必须有我的车拖,因为它不会开始&有一个强烈的气体的气味。车库表示,燃油管路自取灭亡,但是他们不知道为什么;只有猜“软汽车坐骑。”After I got it back, I noticed the engine vibrating/shaking when I start it, then it evens out after the car warms up. Had some start-up issues; got a new battery, but still has some starting issues especially in early, cold morning.The check engine light started flashing on startup, along w/engine shaking, then the shaking would subside & the light may stay on or may go off. This morning, it gave one quick turn-over (1 second), acted like it didn't want to start, then started up and ran ok, though vibrating some & with blue smoke - a lot at first, then subsided some except when accelerating. Never had any of this prior to fuel line coming undone. I'm wondering if there's a fuel line/filter issue? Puzzled, because the car's run smoothly prior to this.

我的车有103000英里。
我的车有一个自动变速器。