I think it could be your donut gasket or a small hole in the exhaust pipe.
You may also need to change the oil. If the oil has not been changed for an extended period of time, the dirt and debris that accumulates in your oil will block the passages to the hydrolic lifters causing them to run "dry".
Be caution with the ticking noise, I once got a good, loud ticking noise in myne and it turned out to be a stuck lifter! Not replacing a stuck lifter can blow your engine.
A rumbling sound when a Civic Hybrid is accelerating could be due to an exhaust leak. When there is an exhaust leak too close to the manifold it can create a deeper rumbling noise.
There are ( 2 EXHAUST MANIFOLDS ) on your 1993 Mercury Villager 3.0 liter V6 engine
Exhaust manifold gasket leaking
you do have an ( 02 ) sensor on the exhaust system
form_title= Automotive Exhaust Parts form_header= Have your exhaust replaced or repaired by the experts. Has your exhaust been smoking?*= () Yes () No Have you heard any strange noises when accelerating?*= () Yes () No Has your car ever failed an inspection?*= () Yes () No
In the exhaust pipe, near the engine.In the exhaust pipe, near the engine.
Black smoke is an indication of an overly rich fuel/air mixture.
check your wiring harness, that would be a good place to start.
it' on the left hand side by the exhaust
It may be the heat shields on the exhaust system vibrating.
For a ( 2002 ) Mercury Grand Marquis : 220 horsepower ( 235 horsepower with dual exhaust )
For some reason the gas is not completely combusting causing water to be expelled in the exhaust pipe.