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2001 Chevy Malibu car hesitating

Tiny
SLIPNBIP
  • MEMBER
  • 2001 CHEVROLET MALIBU
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 10,600 MILES
My 2001 Chevy Malibu has been hesitating more and more. I had the blown intake manifold gasket replaced thinking that was the problem. It wasnt. I then had a complete tune up done on the car. I also had the trans. Fluid checked, it was low so we added some. The problem is not going away. Does anyone know what might be the problem? Whats the deal with the MAF sensor?

Joy
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Monday, January 25th, 2010 AT 3:34 PM

5 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check and test all the following listed 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
Cap and rotor

Note:If it doesn't apply disregard.
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Tuesday, January 26th, 2010 AT 12:15 AM
Tiny
SLIPNBIP
  • MEMBER
  • 3 POSTS
Hello there. I did the intake manifold gasket, replaced the EGR valve. Did a complete tune up. The car is still hesitating on take off. What about the Throttle postion sensor? Any info. Is a huge help.

Joy
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Tuesday, January 26th, 2010 AT 9:09 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
TPS -Try adjusting the idle and WOT voltages on it-
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Wednesday, January 27th, 2010 AT 2:24 PM
Tiny
SLIPNBIP
  • MEMBER
  • 3 POSTS
Hey. I appreciate all your help. What is the WOT? Sorry, Im a girl and trying to solve this prob. By myself.
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Wednesday, January 27th, 2010 AT 3:19 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Okay I understand-The WOT is equals to Wide Open Throttle
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Wednesday, January 27th, 2010 AT 4:55 PM

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