missing and stalling

2001 BUICK LESABRE
200,197 MILES • 6 CYL
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CRAIGSMICHAEL
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  • 1 POST
my 2001 buick lesabre misses under acceleration. sometimes the engine even dies. it definitely gets worse in the rain or even when its damp or very humid. sometimes when it misses the tach stops working. ive replaced plugs and plug wires already.enter your question...
Apr 25, 2011 at 8:57 PM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
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Apr 26, 2011 at 3:38 AM
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RASMATAZ
  • ✓Experienced Mechanic
  • 75,988 POSTS
Could be caused by one of the following below

Oxygen sensor.
Catalytic converter.
Fuel injectors dirty/sticking.
Mass airflow sensor/Airflow meter.
Throttle position sensor.
Crankshaft position sensor
Knock sensor
Manifold absolute pressure sensor.
EGR Valve
Fuel pressure regulator leaking or defective fuel pump.
Fuel contamination.
Foul/defective spark plugs.
Open spark plug wires.
Ignition coil/Coil packs defective.
Incorrect ignition timing.
Cap and rotor.

Note:If it doesn't apply disregard it and keep testing.
Apr 26, 2011 at 3:39 AM
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DAVE'S BIG BACKYARD!
  • EXPERT
  • 262 POSTS
that thing needs a crank sensor.
Apr 26, 2011 at 8:05 PM
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