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1998 Chevy Lumina Lumina has bad acceleration

Tiny
CHUCKD877
  • MEMBER
  • 1998 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 190,000 MILES
Lumina starts fine, runs good but when going down the road you step on the gas to accelerate it acts like it is getting no gas. Should I change the fuel filter and then work my way up to fuel pump? Any other ideas of what this could be?
Tuesday, April 14th, 2009 AT 9:00 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 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
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Tuesday, April 14th, 2009 AT 10:49 PM

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