My daughters car is acting up again. When you first start it everything is fine, but once the car is up to normal temperture the car starts to mis-fire. I had it scanned and it shows a code of all cylinder's mis-firing. This only happens when car get up to temperture. I have changed the spark plugs only. i'm at a lost here. Please help.

 

I wish I could help out more definitively, but it could be a lot of things. But my gut is saying a possible vacuum leak since it is only doing it once the car warms up.

 

Ok, i got a new module and no more misfire.