Tubes for the EGR system (exhaust gas recirculation) can break, causing an exhaust leak and noise under the hood.
1992 Ford Bronco Problem Reports
Most Reported 1992 Ford Bronco Problem Reports
If there is a vibration or noise at highway speed, it could be from the front driveshaft and may require replacement of the double cardan joint. A double cardan joint is a type of driveshaft joint that uses two universal joints.
If a noise from the rear end is heard when going around turns or after driving at highway speed for an extended period, this could be caused by a failing deferential clutch kit. An updated differential clutch kit available.
The upper intake manifold gasket may fail, causing an engine vacuum leak and a high idle condition. A damaged intake gasket should be replaced.
The battery light may illuminate on the instrument panel because the alternator wire harness connector is damaged. A new connector kit is available and should be installed to correct this concern.
Rough idling is often caused by ignition wires that are routed wrong or installed with damaged tips.