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1997 Buick Lesabre

Tiny
DAVIDB87
  • MEMBER
  • 1997 BUICK LESABRE
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 190,000 MILES
My 1997 buick lesabre will start up fine and run fine for a while but out of knowhere it will start chugging like its misfiring and wont go pass the 2 idle. Then while its doing that I mash the gas and the idle drops all the way and cuts off. Somtimes when I mash the gas it wont cut off but act like its choking up
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Wednesday, February 10th, 2010 AT 6:33 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Inspect and test all the following listed 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)
Dirty or worn spark plugs
Bad plug wires
Weak ignition coil
Cap and rotor

Note:If it doesn't apply disregard.
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Wednesday, February 10th, 2010 AT 6:39 PM

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