1999 Civic EX P1399,P0301,P0303,P0300 Misfire Problem -- What to

2-days ago car started with difficulty but started (battery is only one year old), but with obviously louder noise than normal. This morning the CEL started flashing while on the way to work (1.5 mile drive) and engine almost stalled while iding waiting for traffic light. Checked code with P1399 only (random misfire) when I parked in company's parking lot. At noon time I tried to get my car home and found it was hard to accelerate and noise level increased when accelerating. Checked code again after arriving home with P0300, P0301,P0303,P1399.

What shoudl I check /change first on the misfire issues. -- Thanks a lot for advice.

所有跟帖： 

• easily spend more to repair than car's worth -sneezy888- ♂ (199 bytes) () 11/13/2015 postreply 13:14:11

• It happened after hitting a shallow puddle of water at road/road -blueisu- ♀ (237 bytes) () 11/13/2015 postreply 13:25:31

• 四種可能 -潤濤閻- ♂ (682 bytes) () 11/13/2015 postreply 13:39:22

• Thanks a lot for the advice. Got a car two years ago and still p -blueisu- ♀ (325 bytes) () 11/13/2015 postreply 14:00:36

• yes. ignition coil. -潤濤閻- ♂ (0 bytes) () 11/13/2015 postreply 14:20:34

• Could overfilled engine oil cause this problem? -blueisu- ♀ (228 bytes) () 11/13/2015 postreply 22:06:56

• 基本不可能。我的第一輛車引擎蓋有裂痕，到處是油。spark plug wire 上的橡膠套應該可以阻止機油滲入。 -周老大- ♂ (0 bytes) () 11/14/2015 postreply 20:05:57

• 換我先查查distributor cap and rotor, 然後拆wire set and spark plug,量量電阻看 -Oneshotkill- ♂ (305 bytes) () 11/13/2015 postreply 22:26:19

• 我覺得wire的可能性更大。車主說過水坑之後出的事，可能是wire跳動靠近地線而擊穿老舊的絕緣層。 -周老大- ♂ (0 bytes) () 11/14/2015 postreply 20:11:56

• Yes it had difficulty to start right after hitting the water pud -blueisu- ♀ (122 bytes) () 11/14/2015 postreply 20:47:52

• 如果是我，我就先把wire set直接換新的再說。畢竟這是最容易最便宜的做法。當然，主意要你自己拿，還有就是千萬別換錯了。 -周老大- ♂ (0 bytes) () 11/14/2015 postreply 20:55:20

• 再就是畢竟跟高壓打交道，如果是自己換要注意安全。 -周老大- ♂ (0 bytes) () 11/14/2015 postreply 20:58:40

• Thanks -- so need to disconnect battery negative first before re -blueisu- ♀ (0 bytes) () 11/14/2015 postreply 21:45:18

• 我是嚴格按照修理手冊去做的，但是不記得細節了。建議你也這麽幹。如樓上所說，斷開電池是最重要的，性命攸關的。 -周老大- ♂ (125 bytes) () 11/14/2015 postreply 22:42:41