大拿们帮看看并给出出主意.

俺有一辆1996 FORD WINSTAR, 才开了8万多迈,一直都很好,但是前两天有了你们说的敲缸现象,很厉害,而且后面的烟都是蓝色的,开起来味道很呛.

送去检查,给出这样的诊断, Car has a gas leak, gas in oil, car came in with gas smell, gas is going inside the enigine, car came running rough missing, car is running on 3 cylinders, gas is going to the intake.

换了STARTER, ign coil(what's it), fuel pressure reg, 问题一点没解决, 车铺也不想修了, 我就拖回来了.

我想知道,如果修下去大概会花费多少, 车铺的人说我们从来不保养所以问题全来了,什么都旧了, 但是问题是, 平时好好的, 定期换油我们都做了. 

如果卖了, 这种情况也不值什么钱. 能修好最好.

请大家给个建议吧, 谢谢!