Car stumbles at acceleration

Tiny
LARRY MONTGOMERY
  • MEMBER
  • 2000 CHEVROLET IMPALA
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 80,000 MILES
Car stumbles from dead stop. Does not trip any codes. I have replaced almost every sensor including plugs and wires with no effect. Any suggestions.
Friday, April 8th, 2011 AT 1:57 AM

2 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
When was last tune-up?

Could be one of the following below:

Oxygen sensor.

Catalytic converter.

Fuel injectors dirty/sticking.

Mass airflow sensor/Airflow meter.

Throttle position sensor.

Manifold absolute pressure sensor.

EGR Valve

Fuel pressure regulator leaking or defective fuel pump.

False air leakage.

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
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Friday, April 8th, 2011 AT 2:02 AM
Tiny
FREEMBA
  • MECHANIC
  • 1,152 POSTS
Use carburetor cleaner to clean the throttle body (inside where the throttle plates are) and the idle air control solenoid.
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Friday, April 8th, 2011 AT 3:42 PM

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