Clicking sounds coming from manifolds

Hello, honestly - no "obvious" thoughts here, would have to have an evaluation by a technician at a shop near you. If there is stalling, diagnostic testing should be performed to find out the source of a stall -- which may or may not be related to any clicking noise you are hearing. The vehicle is 14 years old with an unknown to us amount of miles and no information about prior maintenance or repairs, not to mention any evidence of testing performed as of yet. As a result it is impossible to guess anything of value for your concern. Seek guidance at a shop near you. https://repairpal.com/auto-repair-near-me Click the link or call us at 877-913-1554. We'll gladly find you a certified RepairPal shop in your area.