1989 Chevy Caprice Feeling low power on acceleration

1989 CHEVROLET CAPRICE
15,000 MILES • V8 • 2WD • AUTOMATIC
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AZIZAM
  • MEMBER
  • 1 POST
Dear Sir,

Feel like very low power while pressing the acceleaaror and makes like a "tired sound" to reach the speed. I changed all spark plug wires , spark plugs and cleaned the fuel injecter. But still the same. The mechanic adjusted the Delco, but it made some additional sound like of motor bike, at below 60kmph speed. Now he can not do much more.Any help?
Dec 25, 2009 at 2:35 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
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
Dec 25, 2009 at 4:13 PM
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