Vehicle ticks during acceleration. Tick goes away while coasting or Idling. Vehicle has not lost any power and does not smoke. Vehicle has been babied its whole life and has its oil changed every 3000 miles religiously. Inspection under the front valve cover was Immaculate, clean as a whistle. I can usually figure something like this out but it has me stumped. Injectors are clean, spark plugs are correctly gaped and not fouled. Any advise will be truly appreciated.