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1988 Chevy Truck

Tiny
VAFIREMAN
  • MEMBER
  • 1988 CHEVROLET TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 135,000 MILES
Sometimes when you push the gas pedal the engine hesitates or delays for a few min. Then picks back up & goes. This is with the engine hot or cold starts.
Friday, November 20th, 2009 AT 8:19 AM

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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Friday, November 20th, 2009 AT 1:40 PM

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