[169mph]

A replaced my spark plugs a few months ago. A few of the plugs looked fouled but overall the plugs looked fine. The engine ran and idled fine initially but over time it started backfiring. Two weeks ago it started to die when stopped a red lights. I pulled the plugs and they were all fouled. This was after being driven less than 50 miles. This week I replaced my plug wires, spark plugs, and the msd ignition coil hoping that would fix what was wrong. This morning I started my car and it seemed to idle better but 2-3 minutes later the engine died. I pulled a couple of plugs and they were both fouled. I plan to call Roush this afternoon to see if I can get the diagnostic tool to help me figure this out. This is very frustrating. Any advice would be appreciated.

Thanks, Mike