1993 Pontiac Firebird has hesitation

1993 PONTIAC FIREBIRD
131,000 MILES • V8 • 2WD • AUTOMATIC
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SPEEDDEMON1322
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  • 1 POST
hi, my formula firebird has a hesitation right when you stomp on the gas. and also, when your into the throttle on quick acceleration it seems to try to hesitate. also, it has a twitchy idle.
Sep 16, 2008 at 4:56 PM
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RASMATAZ
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Possible Causes of Engine Hesitation or Stumble:

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
Sep 16, 2008 at 5:11 PM