Engine Backfired blewout muffler & resonator

Posted by 56PKRDGUY On 2020/11/20 19:03:08

Hi Guys. Have not a clue on this one. Was having trouble with my 56 Packard 400 where I would be driving then all of a sudden a big jerk like the engine was skipping or missing almost like out of gas then would come back running good.
This happened enough where i was very concerned with safety driving my car.

I replaced points gaped at 16, new cap,rotor,condenser,put new wires in the distributor as the the cloth seemed frayed,checked timing 15 degrees, still have the issue when it gets warm. Also new spark plug wires. Today I drove it about 20 minutes to my destination no problem. Coming home it started to jerk again and then backfired and put a huge hole in my muffler and resonator on the drivers side.

I did check the the mechanical advance seems to work when I put higher the rpms.

Please I need help with this. Looking into getting my distributor rebuilt car has around 96,000 mile on it.

Thanks

Gary