maki-ambush na din ng thread mo sir deadly. my 102 gas engine gives a subtle diesel-like sound during a cold start-up at idling mode. usually lasts for several seconds or less than a minute, pero pag uminit na pino na ang tunog at idling. i know this is not normal kase nakakaasiwa yung tunog, sobrang sensitive/OC ko pa naman sa mga ganitong issues. what could be the culprit and the "cure" na din mga bossing?

she is scheduled for her regular pms this month. makuha kaya sa change oil and tune up?

TIA