1987 Chevy Nova Not running right

1987 CHEVROLET NOVA
109,000 MILES • V8 • 2WD • AUTOMATIC
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DRAVENELL
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  • 1 POST
my nova cranks up fine, but while driving it will cut back to 30mph and i can press the gas and it will stay there untill i put it in neutral and rev the gas and it will sometime run fine after that
May 8, 2009 at 8:58 PM
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RASMATAZ
  • CERTIFIED EXPERT
  • 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
May 8, 2009 at 9:02 PM