[Mysterytrain]

You need to step back and think about what you just said. A massive air leak will be a massive air leak all the time. I suppose if you could get the car running and at operating temperature you could adjust the mixture and the idle so that it would run well. I doubt it would restart. You state that its hard to start, when it does start it idles high and runs well when warm. You really need to look at what is suppose to be happening when the engine is cold and transitioning to operating temp.