I've been having the same issue with my flex pipe. The flex pipe doesn't have a hole in it but the weld has come off from I'm guessing the header. Took the escort to a garage and the guys said I would need a new flex pipe and muffler, he said the cost would be around $320.00. I have been driving with the flex pipe like this for about 2 years but to muffle the noise I put two brackets around the pipe and criss crossed them, eventually it will loosen and you will have to tighten them back up. I need a cheap, easy and permanent fix.