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1993 Eagle Summit hesitation

Tiny
WISTERIA
  • MEMBER
  • 1993 EAGLE SUMMIT
Engine Performance problem
1993 Eagle Summit 4 cyl All Wheel Drive Automatic

While driving yesterday, my car began to hesitate, like it wasn't getting fuel, I had just gassed up, and so added an additive to the tank, the car ran fine for 30+miles, and began to hesitate again. Please HELP!
Thank you Donna
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Monday, June 29th, 2009 AT 5:43 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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Monday, June 29th, 2009 AT 6:08 AM

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