Hi I am looking for some pointers here, I drove the car home last week and it seemed lumpy when driving it. I got in the car the next day and the car would not start. The engine turns over but there is no Ignition. I have changed the spark plugs, but still it just wont fire. Any pointers to what I can look at ?. I have found the coil pack could cause this to happen but would it just stop the ignition just like that ?