车“突突突的“和CHECK ENGINE的黄灯亮了
 

Ford Focus SE 2002已经跑了近12公里。
最近一个月经常发现停车等红灯时感觉车“突突突的”；偶尔也发生当加速的时候比如从40公里时速加到60公里时会感觉车速有点滞后好象打滑的样子（当然应该不是胎打滑）。今天下午又发现CHECK ENGINE的黄灯亮了，根据随车所带的汽车使用手册说这个CHECK ENGINE的灯是负责EMISSION系统。

请教大侠是不是应该换排气系统或者什么一些垫圈等？

谢谢！

去修车铺子看看是不是排气管子有洞洞了:belial:

是连接ENGINE 顶部到后下部的橡胶管（有称真空管）有
 

破损或漏气，严重时汽车在等红灯时会自动停止运转。

让DEALER检查了一下，说有可能是车ENGINE的汽缸问题，当然修复要花不少钱。
现在我只能就怎么开着，CHECK ENGINE灯有时亮有时不亮
如果车爬坡加速，感觉车突突的。

真是没办法

建议先读码确认。

读码数 是 P0303

2002年得才跑了12公里，只能说零件老化了。。。:belial::belial::belial:

这个意思是点火线圈
 

问题，或者点火线的问题，或者油压不正常。 突突突可能是因为缺缸引起的，并且是3号缸没有点火。

It means that there is a misfire on cylinder number three. The cause could be in the ignition system (coil, plugs, plug wires), or high and low fuel pressure

Read more: http://wiki.answers.com/Q/What_does_...#ixzz1OYMPgHOv

三号缸缺缸。从简单的做起，火花塞，线，点火线圈。

Dealer很快地检查了：
Cylinder head assembly complete
Head gasket
Lower intake gasket
Exhaust manifold gasket
PCV valve
Oil filter
Coolant
Sparkplugs
Wire set for plugs
EGR tube gasket
然后说以上项目没有检查出问题
说是要进一步把缸取下作检查，由于要当天用车我就没让他们接着检查就把车开走了，现在就是CHECK ENGINE灯时亮时不亮，上坡加速感觉车突突地
（Cylinder 3 will need to tear down to inspect and do TSB 04-09-01, possible carbon build causing sticking valves causing misfire, could be PCM related...）

Dealer检查收费多少？

就算上述项目均正常，应该检查缸压。

P0303 是3号缸misfire 。

Do as above suggested: check ignition coil, spark plug, plug wires
replace any one of them if it has some kind of broken sign.

把3号缸点火线摘下来，然后找人发动车子
 

看有没有火花。或者你自己先拔掉3号点火线，然后发动，把线事先靠近发动机一公分左右，看有没有火花出来。

try to google this:
ford focus 2002 TSB carbon build sticking valves

you will see:

......I suspect your rough idle and stalling problem is caused by one or more exhaust valves sticking, which is a well known problem on the 1997-2002 2.0L Ford Escort as well as the 2000-2002 2.0L Ford Focus. The sticking exhaust valves is caused by excessive carbon build-up between the valve stem and valve stem guide. The fix at a Ford dealership is to replace the cylinder head with a newer designed head which has revised valve guides to help prevent carbon build-up. As the problem worsens it will eventually trigger the malfunction indicator light. Here is the TSB Ford issued to address the diagnostic trouble codes that will accompany the MIL warning when the problem worsens:

http://www.justanswer.com/uploads/eb...202142_tsb.pdf

But replacing the original cylinder head with the newer designed head is not necessary. Doing that will "help prevent carbon build-up" but you can easily and quickly clean-up the carbon build-up and restore performance and smooth idle with SeaFoam but you MUST apply it properly to thoroughly de-carbon the valve stems and valve stem guides as well as the combustion chambers, valves, and valve seats. To thoroughly de-carbon the valve stems and valve stem guides you MUST pour 1/3rd of the SeaFoam into the engine crankcase......

应该是典型的缺缸了，火花塞，高压线