Inspect the exhaust system Ford F150
1. With the engine cold (at least three hours after the vehicle has been driven), check the complete exhaust system from the engine to the end of the tailpipe. Ideally, the inspection should be done with the vehicle on a hoist to permit unrestricted access. If a hoist isn’t available, raise the vehicle and support it securely on jackstands.
Check the connections for exhaust leaks — also check that the clamp retaining nuts/bolts are securely tightened
Check the exhaust system hangers for damage and cracks
2. Check the exhaust pipes and connections for evidence of leaks, severe corrosion and damage. Make sure that all brackets and hangers are in good condition and tight.
3. At the same time, inspect the underside of the vehicle body for holes, corrosion, open seams, etc., which may allow exhaust gases to enter the passenger compartment. Seal all body openings with silicone or body putty.
4. Rattles and other noises can often be traced to the exhaust system, especially the mounts and hangers. Try to move the pipes, muffler and catalytic converter. If the components can come in contact with the body or suspension parts, secure the exhaust system with new mounts.
5. Check the running condition of the engine by inspecting inside the end of the tailpipe (with the engine off). The exhaust deposits here are an indication of engine state-oftune. If the pipe is black and sooty or coated with white deposits, the engine may need a tune-up, including a thorough fuel system inspection and adjustment.