The engine may misfire and/or buck while driving at freeway speeds with no fault code stored in the powertrain control module (PCM). This can be caused by an intermittent fault with the camshaft synchronizer assembly. This condition can be diagnosed by monitoring knock sensor data as per Ford service bulletin #05-22-12. Replacement of the synchronizer assembly will be required to correct this concern.
Problems for specific Ford Ranger years:
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Most reported 1993 Ford Ranger problems
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 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.
Ranger 3.0L and 4.0L
The temperature gauge on the instrument panel may fluctuate and give incorrect readings. If this happens, a new gauge and sender kit should be installed. The sending unit "sends" the information to the gauge.
If oil is leaking from the gaskets and seals, the engine needs to be resealed.