engine noise

My 2007 fj cruiser has a problem. I started it up today and it made a dieseling sound and acted like it didn't want to start which it has never done. It has 184000 miles and I drive it an average of 101 miles a day. Oil looks ok. Filter ok. Has never had anything done like a tune up, or timing...

2007 6MT ~95k....had just finished installing new LED lights on front end, and started it up and noticed a faint but definitely audible whining sound coming from the front of the engine bay, also audible in the cab while idling and driving at low speeds. Not sure if this has anything to do with...