Hey guys I was hoping to get some help. I have had a cel along with vcs and vcs off lights on for a while. Its really cold in ND, and when it gets to about 30 degrees it goes away. Today I was driving and all of the sudden I was having engine shakes a misfiring engine and a blinking cel. This only happened after it was warmed up, and i was at a stop not in park, like at a stop sign. So I read the codes and got 1,3,5,7 cylinders were misfiring. I changed the spark plugs, and it was running just fine. Then when I went to pick up dinner I had the same issue. CEL blinking, Engine shakes, and misfiring, but still in the weird situation. What is my best course of action. And I was cold as sh@t today so maybe it will change with the weather. Thanks for any ideas.

 

What codes did you get?? I mean besides it telling you there are misfires what are the actual codes??

 

p300 p301 p303 p305 p307

 

Do you know when the last time the 02 sensors were replaced? Also check to make sure you don't have any vacuum leaks. And since you changed the spark plugs you should also look at your coil packs. If the coils are bad it will also cause misfires. A lot of different things can be wrong but its always better to start with the easiest and cheapest and work your way up before spending money to replace CATS.

 

Thanks for the help

 

How would I go about checking coils
?

 

You can run your car and literally unplug each coil 1 at a time. If the car starts running rough when you unplug it and then smooth once you plug it back in....then that coil is working properly. If you remove a coil pack and nothing changes in the way the motor is running, then that coil is shot. But they could also be working intermittently so this method won't be 100% guarantee to work. But it is simple enough. Do you know when they were last replaced?

 

Watch that video. It is on a Rx300 so the engine is different. We only have 3 coil packs instead of 6 and they are in a straight line as Im sure you saw when doing your plugs. But if you watch at around 9:00 minutes in the video he shows you what I am talking about in regards to removing it and hearing the sound of the engine change.