1997 Opel Astra Poor Acceleration

1997 OPEL ASTRA
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DANSOFRED
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Engine Mechanical problem
1997 Opel Astra 6 cyl Front Wheel Drive Manual

The car does not accelerate the way it should. the car moves slow when you step of full accelerator. It became difficult moving fast when climbing a hill.
Oct 2, 2009 at 9:38 AM
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RASMATAZ
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Probable causes below:

Oxygen sensor
Catalytic converter
Dirty fuel injectors (cleaning the injectors often fixes this).
Bad MAP (manifold absolute pressure) sensor
Bad TPS (throttle position) sensor
Bad or dirty MAF (mass airflow) sensor
Low fuel pressure (leaky fuel pressure regulator or weak fuel pump)
Vacuum leaks (intake manifold, vacuum hoses, throttle body, EGR valve)
Bad gasoline (fuel contaminated with water or too much alcohol)

Sometimes, what feels like a hesitation is actually ignition misfire rather than lean misfire. The causes of ignition misfire may include:

Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Wet plug wires
Oct 2, 2009 at 11:12 AM