1995 Chevy Lumina Feels liking stalling at high speed accel

1995 CHEVROLET LUMINA
125,000 MILES • 6 CYL • FWD • AUTOMATIC
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SCUBAMHILL
  • MEMBER
  • 1 POST
When driving at interstate speeds and trying to accelerate my car feels like its stalling. If i hit the gas hard it does just fine. Light acceleration however causes it to shake and get really sluggish not picking up much speed at all. For instance at 70 with the cruise set it runs great until i go up a hill. Then the shaking starts almost like its starving for gas. I use the reference "like when you gas a weed eater too hard and it doesnt rev up it just floods and sputters for a sec". I've changed fuel filter spark plugs, wires and tried fuel system cleaner. And Ideas???
Feb 6, 2010 at 7:13 AM
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RASMATAZ
  • CAR REPAIR CONTRIBUTOR
  • 75,992 POSTS
Inspect and test all the following listed below:

Oxygen sensor
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)
Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Cap and rotor

Note:If it doesn't apply disregard.
Feb 6, 2010 at 7:30 AM
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