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1995 Chevy Monte Carlo sevice engine soon light

Tiny
RENEEMARIE
  • MEMBER
  • 1995 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 150,000 MILES
Service engine soon light goes on then of on then off
when its on the car behaves wierd. It stutters and hesitates then goes bogs down then its ok when the light goes off. Tried better grade gas and fuel ingector cleaner.
It doesn't stay on every day but it hapeens on and off
HELP
Can't afford anything major
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Saturday, January 16th, 2010 AT 6:20 AM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test the following below:

Oygen Sensor
Catalytic Converter
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
Cap and Rotor

Note:If it doesn't apply, disregard.
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Saturday, January 16th, 2010 AT 7:03 AM

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