2003 Chevy Cavalier frustrating

2003 CHEVROLET CAVALIER
175,000 MILES • 4 CYL • FWD • MANUAL
Avatar
FOREVER CHEVY
  • MEMBER
  • 1 POST
my car decides to hesitate as if its not burning all the gas being supplied,but once i reach bout 3000 rpm it will pick up n accelerate.i changed fuel pump,fuel filters,plugs,wires,both 02sensors front n back,map sensor n cant figure it out. i never changed the coil pack or any of the fuel injectors because it became a price issue,have any ideas?
Aug 7, 2010 at 10:16 AM
Advertisement
Avatar
RASMATAZ
  • ✓ASE Certified Mechanic
  • 75,992 POSTS
  • ASE Certified Mechanic
Lack of acceleration,chugging,hesitating,bogging,misfiring etc. could be caused by one of the following below:

Inspect and test all the following item below-we start here and comback with the results.

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.
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 it.
Aug 8, 2010 at 12:22 AM
Join 2CarPros for free, one of the most advanced car repair communities on the internet. From first-time drivers to seasoned mechanics, everyone is welcome to reply, share details, and get better answers. You can add a temporary image or video first; uploads are limited to 20 MB.
Ask a Free Question
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.