ok heres my symptoms
I installed new plugs.
The engine ran perfect so I jumped on the highway to air it out

I went about 100mph got off the exit and came back to the house.
The car (1.9L) was running like sh*t.
Pulled the #4 plug and the whole tip was melted off.
Replaced the plug, disconnected the battery (1 hour), hooked the battery back up and aired it out again.
Came back same problem tip was melted off.
I am lost right now but a freind of mine says it's a bad injector.