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Problems for specific Ford Aerostar years:

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Repairpal verified 1990 Ford Aerostar problems

 

Verified for the Ford Aerostar

Bad throttle position sensors can cause high idle without causing the Check Engine Light to illuminate.

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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.

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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.

 

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Verified for the Ford Aerostar

Failure to change the power steering fluid can cause the fluid to become gray with metal particles. The contaminated fluid can damage the power steering pump resulting in a growling noise when the wheel is turned; the damaged pump will require replacement to eliminate the noise.. Life of the power steering gearbox and pump will be shortened if the fluid is not serviced regularly.

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Verified for the Ford Aerostar

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.

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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.

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Verified for the Ford Aerostar

The valve cover gasket may fail, causing engine oil to leak onto the exhaust manifolds.

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Verified for the Ford Aerostar

The front brakes may stick, bind, or grab. This can happen when the front brake caliper pins become corroded. Cleaning or replacing the caliper pins will be necessary to correct this problem.

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Verified for the Ford Aerostar

While steering, if you hear a clunk or a rattle, or if you experience premature tire wear, this could indicate the inner tie rod ends are loose or worn and will require replacement.

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Verified for the Ford Aerostar

Engine oil leaks are known to develop around the rear crankshaft (main) seal and engine oil pan gasket.

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Verified for the Ford Aerostar

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.

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Verified for the Ford Aerostar

An engine knocking noise coming from the lower end during acceleration is common and could be caused by worn or damaged engine bearings.

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Verified for the Ford Aerostar

For the 2.3L 4 Cylinder and 5.0L V8 engine, the electrical ignition switch poses a fire hazard. An updated switch is available.

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Verified for the Ford Aerostar
MAP (manifold absolute pressure) sensor failure is common and the MAP sensor hose to the intake port commonly plugs up or breaks, which can cause unstable idle conditions.
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