At higher mileages (125,000 -150,000) the power steering pump may begin to leak on the 6 cylinder vehicles and could require replacement.
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Newest reported 1994 Toyota Pickup problems
The Throttle Position Sensor can get out of adjustment due to wear in the throttle body or due to carbon build up. This will cause the idle timing to advance more than 30 degrees which will cause very high HC and NOx emissions. Conversely, the Throttle Position Sensors can wear out and not properly advance the timing which causes a lack of power and poor fuel economy.
The Ignition Coil wire insulation is often rubbed through by the Primary wiring harness which will cause a stalling/no-start condition. The coil wire will need to be replaced and the primary harness will need to be repaired and re-routed.
It is important to regularly check the valve clearance as the exhaust valves may become too tight. This will lead to valve failures, which are expensive to repair.