2009 Jeep Liberty Sport 6 Cyl 3.70L
My jeep used to have a somewhat quite engine. Now its a loud roaring when accerlating (no whinning or grinding)
Also experiencing loss of power of acceleration, bad gas mileage. Nothing looks to be leaking? Air filter recently changed.
Check the following: exhaust system - from tailpipe to exhaust manifold gasket for any leaks, air intake system, engine vacuum hoses for leaks / cracks - replace as necessary.