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2000 Chevy Monte Carlo car hesitation

Tiny
COLLINJ
  • MEMBER
  • 2000 CHEVROLET MONTE CARLO
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 113,000 MILES
My 2000 monti carlo SS hesitates between 1500 and 2000 RPM when accelerating. Has had a recent tune up and I cleaned the mass flow sensor. Any idea to the cause of this?
Friday, January 1st, 2010 AT 11:51 AM

1 Reply

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

Oxygen Sensor
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
Coil and Rotor
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Friday, January 1st, 2010 AT 6:52 PM

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