probably from a bad egr valve or no vaccume goimg 2 the valve. i had this same problem and the Mass Air Flow was replaced and the rattle/sizzle sound went away and engine power returned.
because you did it wrong
Plug might be cracked .And might be arching
Sounds like an internal malfunction. Have it professionally serviced.
Check for a broken motor mount or transmission could be going bad.
water pump or thertomstat
What kind of howling? Or is it a whining? Where does it sound like it's coming from.
Do you have the 5 speed manual version or the automatic? If it is the manual version then its just because you are letting out of the clutch too fast
A good chance its the Idle Control Valve
If there is problems with shaking in a Ford ranger, it could be a lot of different things, like the cam sensor or the fuel filter. It would be a good idea to have it looked at professionally just in case, to avoid anything happening down the road.
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your air cleaner could be dirty, u might need some fule injection cleaner, the timing , sparkplugs. these are all posibals to check.
check the fluid in the rear end it might be dry causing medal to grind causing a clunk noise or the gears in the rear end or worn done causing it to do the same thing