Try and isolate the sound. It could be valves, injectors, or an exhaust leak. Cut a piece of garden hose to use as a stethoscope, or buy one from a parts shop.


4x4Wire's Toyota Section
1995 FZJ80 LandCruiser - 3 locking diffs, +200k mi, JD HIR's, 285/75R16 Nitto TG's
Olde North State Cruisers