Problem Reports
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1994 Ford Aerostar Problems
Engine Oil Leaks
Engine oil leaks are known to develop around the rear crankshaft (main) seal and engine oil pan gasket.
Crossed Oxygen Sensor Wires Can Cause Poor Idle Quality/Fuel Economy
If you experience poor idle quality and fuel economy (and the Check Engine Light illuminates) after the exhaust system or motor has been removed and replaced, it could be that the oxygen sensor wires are crossed at the rear of the motor. Wiring schematics should be checked to ensure that the correct harness plug is connected to the corresponding sensor.
Valve cover gasket may fail and leak oil onto exhaust manifold
The valve cover gasket may fail, causing engine oil to leak onto the exhaust manifolds.
Updated Differential Clutch Kit Available if Rear End Noise is Heard
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.
Worn/damaged engine bearings can cause engine knocking noise
An engine knocking noise coming from the lower end during acceleration is common and could be caused by worn or damaged engine bearings.
AC Not Cold Due to Out of Adjustment Air Blend Door
The AC system may be performing poorly even if it seems to be functioning properly. This could be caused by the AC air blend door being out of adjustment.
Excessive Cycling of AC Compressor Clutch
Excessive cycling of the AC compressor clutch when the system is fully charged could be caused by sludge that has built up on the engine throttle body. Throttle body should be cleaned periodically unless there is a sticker on it stating no cleaning is allowed. Some throttle bodies have a special coating that should not be cleaned.
Vacuum hose damage due to oil contamination
Vacuum hose damage is common due to engine oil contamination or a plugged PCV valve.
Transmission Problems Common Due to Front Pump Failure
Transmission problems are common in this model, often as a result of a failed front pump. The pump loses its ability to create hydraulic pressure, which an automatic transmission needs to function. A sign of front pump failure can be a whine type noise.
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