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Most Common Car Issues Vin Explorer

Most Common Car Issues

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Engine Manufacturer
Porsche AG
Model Year
1991

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Engine Brake (hp) From
Engine Number of Cylinders
Make
Model

MOST COMMON PROBLEMS

PORSCHE 944 1991

The 1991 Porsche 944 S2 is a classic convertible with a 2.99L engine producing 208 horsepower. Manufactured by Porsche AG in Germany, this model features a 4-cylinder engine and a passive restraint system. With its sleek design and powerful performance, the 944 S2 offers an exhilarating driving experience.

Spec:

Engine Brake (hp) From
208
Engine Manufacturer
Porsche AG
Engine Number of Cylinders
4

Problems:

Oil leaks
The 1991 Porsche 944, like many older vehicles, can develop oil leaks from various locations such as the oil pan gasket, valve cover gasket, or camshaft seals.
Timing belt failure
The 944's engine uses a timing belt, which can wear out or break if not replaced at recommended intervals, leading to severe engine damage.
Cooling system issues
Over time, the cooling system components like the radiator, water pump, and hoses can fail, causing overheating and potential engine damage.
Vacuum leaks
The rubber vacuum hoses can become brittle and crack, leading to vacuum leaks that can cause rough idling or poor engine performance.
Fuel injector problems
Fuel injectors can become clogged or fail, leading to poor fuel delivery, misfires, and reduced engine performance.
Head gasket failure
The head gasket can fail, leading to coolant mixing with engine oil or causing compression loss, which can result in overheating and engine damage.
Worn engine mounts
Engine mounts can deteriorate over time, leading to increased engine vibrations and noise.
Mass air flow (maf) sensor issues
A faulty MAF sensor can cause incorrect air-fuel mixture readings, leading to poor engine performance and reduced fuel efficiency.
Ignition system problems
Components such as spark plugs, ignition wires, and distributor caps can wear out, leading to misfires and starting issues.
PORSCHE 944 1991

The 1991 Porsche 944 S-2 is a sleek coupe with a 2.99L engine delivering 208 hp, manufactured by Porsche AG in Germany. This 2-door passenger car offers a thrilling ride with a 4-cylinder engine and comes equipped with front airbags and a passive restraint system for safety.

Spec:

Engine Brake (hp) From
208
Engine Manufacturer
Porsche AG
Engine Number of Cylinders
4

Problems:

Oil leaks
The 1991 Porsche 944, like many older vehicles, can develop oil leaks from various locations such as the oil pan gasket, valve cover gasket, or camshaft seals.
Timing belt failure
The 944's engine uses a timing belt, which can wear out or break if not replaced at recommended intervals, leading to severe engine damage.
Cooling system issues
Over time, the cooling system components like the radiator, water pump, and hoses can fail, causing overheating and potential engine damage.
Vacuum leaks
The rubber vacuum hoses can become brittle and crack, leading to vacuum leaks that can cause rough idling or poor engine performance.
Fuel injector problems
Fuel injectors can become clogged or fail, leading to poor fuel delivery, misfires, and reduced engine performance.
Head gasket failure
The head gasket can fail, leading to coolant mixing with engine oil or causing compression loss, which can result in overheating and engine damage.
Worn engine mounts
Engine mounts can deteriorate over time, leading to increased engine vibrations and noise.
Mass air flow (maf) sensor issues
A faulty MAF sensor can cause incorrect air-fuel mixture readings, leading to poor engine performance and reduced fuel efficiency.
Ignition system problems
Components such as spark plugs, ignition wires, and distributor caps can wear out, leading to misfires and starting issues.
PORSCHE 911 1991

The 1991 Porsche 911 Carrera is a classic convertible with a 3.6L engine delivering 247 hp. Manufactured in Stuttgart-Zuffenhausen, Germany, this two-door sports car features a 6-cylinder engine and a passive restraint system. It's a quintessential blend of performance and style from Porsche AG.

Spec:

Engine Brake (hp) From
247
Engine Manufacturer
Porsche AG
Engine Number of Cylinders
6

Problems:

Oil leaks
Older Porsche 911 models, including the 1991 version, are notorious for oil leaks, particularly from the valve covers and oil return tubes.
Cylinder head issues
The air-cooled engines in older 911s can develop cracks in the cylinder heads, leading to loss of compression and engine performance issues.
Timing chain tensioner failure
The timing chain tensioners in these engines can fail over time, causing the timing chain to become loose and potentially leading to severe engine damage.
Valve guide wear
Excessive wear on the valve guides can lead to increased oil consumption and reduced engine performance.
Cooling system problems
Being air-cooled, the engine can suffer from overheating issues, especially if the cooling fins are clogged or the cooling fan is malfunctioning.
Worn engine mounts
Over time, the engine mounts can wear out, leading to increased engine vibration and noise.
Fuel injection issues
The fuel injection system, particularly the Bosch Motronic system used in this era, can develop problems that affect engine performance and fuel efficiency.
Exhaust system corrosion
The exhaust system components, including the headers and mufflers, can corrode over time, leading to exhaust leaks and increased emissions.
Intake manifold leaks
The rubber intake manifold gaskets can deteriorate, causing vacuum leaks that lead to rough idling and poor engine performance.
PORSCHE 944 1991

The 1991 Porsche 944 S-2 is a convertible/cabriolet with a 2.99L, 4-cylinder engine producing 208 horsepower. Manufactured by Porsche AG in Neckarsulm, Germany, this two-door passenger car offers front airbags for both driver and passenger. Sporting a classic design, it runs on gasoline and features a passive restraint system for added safety.

Spec:

Engine Brake (hp) From
208
Engine Manufacturer
Porsche AG
Engine Number of Cylinders
4

Problems:

Oil leaks
The 1991 Porsche 944, like many older vehicles, can develop oil leaks from various locations such as the oil pan gasket, valve cover gasket, or camshaft seals.
Timing belt failure
The 944's engine uses a timing belt, which can wear out or break if not replaced at recommended intervals, leading to severe engine damage.
Cooling system issues
Over time, the cooling system components like the radiator, water pump, and hoses can fail, causing overheating and potential engine damage.
Vacuum leaks
The rubber vacuum hoses can become brittle and crack, leading to vacuum leaks that can cause rough idling or poor engine performance.
Fuel injector problems
Fuel injectors can become clogged or fail, leading to poor fuel delivery, misfires, and reduced engine performance.
Head gasket failure
The head gasket can fail, leading to coolant mixing with engine oil or causing compression loss, which can result in overheating and engine damage.
Worn engine mounts
Engine mounts can deteriorate over time, leading to increased engine vibrations and noise.
Mass air flow (maf) sensor issues
A faulty MAF sensor can cause incorrect air-fuel mixture readings, leading to poor engine performance and reduced fuel efficiency.
Ignition system problems
Components such as spark plugs, ignition wires, and distributor caps can wear out, leading to misfires and starting issues.
PORSCHE 911 1991

Experience the thrill of the 1991 Porsche 911 Turbo, a German-engineered marvel from Stuttgart-Zuffenhausen. This iconic coupe boasts a powerful 3.3L, 6-cylinder engine delivering 315 hp, ensuring exhilarating performance. With its sleek two-door design and advanced safety features, including front airbags and a passive restraint system, it epitomizes Porsche's commitment to excellence.

Spec:

Engine Brake (hp) From
315
Engine Manufacturer
Porsche AG
Engine Number of Cylinders
6

Problems:

Oil leaks
Older Porsche 911 models, especially those with air-cooled engines, are prone to oil leaks due to worn gaskets and seals.
Valve guide wear
The valve guides in the engine can wear out over time, leading to increased oil consumption and smoke from the exhaust.
Timing chain tensioner failure
The timing chain tensioners can fail, which may cause the timing chain to become loose and lead to engine damage.
Cylinder head cracks
Air-cooled engines can develop cracks in the cylinder heads, especially if the engine has been overheated.
Fuel injector issues
Clogged or malfunctioning fuel injectors can lead to poor engine performance and reduced fuel efficiency.
Spark plug fouling
Spark plugs can become fouled with oil or carbon deposits, causing misfires and rough running.
Air intake leaks
Leaks in the air intake system can cause unmetered air to enter the engine, leading to poor performance and drivability issues.
Cooling system problems
Although air-cooled, these engines can still suffer from inadequate cooling, especially in hot climates or during spirited driving.
PORSCHE 911 1991

The 1991 Porsche 911 Carrera is a classic convertible equipped with a powerful 3.6L engine, producing 247 horsepower. Manufactured in Stuttgart-Zuffenhausen, Germany, this iconic sports car features a 6-cylinder engine and a passive restraint system for safety. With its sleek design and top-down driving experience, the 911 Carrera remains a timeless symbol of Porsche's engineering excellence.

Spec:

Engine Brake (hp) From
247
Engine Manufacturer
Porsche AG
Engine Number of Cylinders
6

Problems:

Oil leaks
Older Porsche 911 models, including the 1991 version, are notorious for oil leaks, particularly from the valve covers and oil return tubes.
Cylinder head issues
The air-cooled engines in older 911s can develop cracks in the cylinder heads, leading to loss of compression and engine performance issues.
Timing chain tensioner failure
The timing chain tensioners in these engines can fail over time, causing the timing chain to become loose and potentially leading to severe engine damage.
Valve guide wear
Excessive wear on the valve guides can lead to increased oil consumption and reduced engine performance.
Cooling system problems
Being air-cooled, the engine can suffer from overheating issues, especially if the cooling fins are clogged or the cooling fan is malfunctioning.
Worn engine mounts
Over time, the engine mounts can wear out, leading to increased engine vibration and noise.
Fuel injection issues
The fuel injection system, particularly the Bosch Motronic system used in this era, can develop problems that affect engine performance and fuel efficiency.
Exhaust system corrosion
The exhaust system components, including the headers and mufflers, can corrode over time, leading to exhaust leaks and increased emissions.
Intake manifold leaks
The rubber intake manifold gaskets can deteriorate, causing vacuum leaks that lead to rough idling and poor engine performance.
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