1993 Chevy Lumina

Tiny
CHRISTOPHER81
  • MEMBER
  • 1993 CHEVROLET LUMINA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 127,000 MILES
I have 1993 z34 and while i'm gone down the road it starts stumbling or cutting out, I have changed the fuel filter, air filter, and put fuel treatment in it.
Monday, May 24th, 2010 AT 9:48 PM

1 Reply

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

Oxygen 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
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Monday, May 24th, 2010 AT 10:28 PM

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