It seems that as soon as I fix one problem on the Six Pack, that there's another one that crops up. I'm getting really tired of this crap. My stock 440 Six Pack runs really strong but lately, it has become very hard to start - hot or cold. It has an MSD ignition system and coil. I pump and pump and pump and pump and it turns and turns and turns and turns and eventually starts. Sometimes gas fumes will pop up out of the middle carb while trying to start it. Any suggestions?