New guy saying Hi

Anyway i have a question on my wifes accord V6. It just started being hard to start,thinking fuel filter. On the other hand she told me and i knoested that sometimes the tac kinda flicks up/down,also thing censer but don't know which one i would be,and help?
The car has 80k and Ive done rutean matanice,cant remember if i did the fuel filter but i will get to that. Ive changed the trans fluid(Honda fluid only) going to do it again. When should i do the timing belt,60k or 100k?

My gm truck motor just spun a bearing and i have it ripped and sitting on the stand,I'll be opening it up next weekend so...

Anyway sorry for the long post but any help would be greatly appreciated. Sorry if i've mis-spelled a few words.