1990 Porsche 944 Problem Reports

Newest 1990 Porsche 944 Problem Reports

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Due to a broken plastic link at the servo motor for the heater control flap, the interior temperature can become wildly erratic.

In automatic transmissions, the flexible hub at the engine flywheel may deteriorate and fail, causing a large amount of play in the driveline. This failure may be caused by prolonged engine oil leaks.

The driveshaft bearings on higher mileage vehicles may become noisy.

Due to a failed resistor pack, the HVAC fan may only operate on the high speed setting.

Air leaks at the manifold gaskets can cause engine misfire (especially at idle) or black smoke under load.

Engine oil leaks at the cam housing, balance shaft, cam shaft, and oil pump should be repaired quickly. The timing belt can become oily and deteriorate if leaks are not repaired.

Engine shut down or a "No Start" may be caused by cracks at the DME (fuel pump) relay solder joints. Repairing or replacing the failed relay should correct this concern.

The constant velocity (CV) boots and CV joints should be inspected at each service. Servicing the torn CV boots early can prevent the need to replace the CV half shaft or CV joint.

Suspension components (including control arms, boots, and ball joints) are critical and require regular inspection.

If engine misfiring, rough running, or fuel consumption issues are not resolved quickly, the catalytic converter can overheat and fail.

Pay close attention to warning lights and have the brakes inspected regularly—immediately address any brake problems. Hard driving habits will cause excessive brake pad and rotor wear.
Timing belt life cannot be ascertained by inspection only. The timing belt and water pump must be maintained using the correct belt-adjustment tool. 

Aged brake fluid can cause numerous problems and should be replaced regularly.

Issues with the air flow meter flap or calibration can cause fuel mixture control problems.
The cooling system must be inspected regularly, as small leaks can develop at the reservoir. The heater valve and fan operation should also be inspected.