[s-cars] burned out plugs and leads

[Michael Mulholland]

here we go again....my sons 95 s6 began misfiring this morning just as it had done many times before. in october we greatly enriched the dealer and lost the car for 30 days for the same trouble. this time it was spark plug #1 that totally evaporated its core and elbow platinum connectors (previously it had been # 2 ) it then destroys the porcelain and the lead. the pos have been replaced along with new plugs F5DPOR, new leads and all new coils. the other plugs look overheated and i suspect a lean mixture as the cause. the dealer says that all is ok with the fuel.
help please
mike