1995 GMC C1500 Hesitation

1995 GMC C1500
139,000 MILES • V8 • 2WD • AUTOMATIC
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KAST3
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I have the truck listed above. When the weather is cold, after warming it up, when you put the truck in gear it stalls. Also from a dead stop, after the truck has warmed up, it hesitates. Please help!!!
Feb 13, 2009 at 8:16 PM
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RASMATAZ
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1995 GMC C1500 Hesitation could be caused by the following:

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
Feb 13, 2009 at 8:23 PM