2001 Chevy Impala Once the car warms up, it goes downhill f

2001 CHEVROLET IMPALA
19,800 MILES • 6 CYL • FWD • AUTOMATIC
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APRILFOOL06
  • MEMBER
  • 1 POST
When the engine is cold, the car will run fine. Once the engine warms up and you get the speed up to 55, the car starts jerking and acts like it is starving for fuel.
I had the fuel pump checked and the pressure is 56. I have replaced the plugs, wires, o2 sensors, catalytic converter, throttle sensor, intake gaskets, hoses, and a number of other parts that I can't think of right now.
The guy that is checking out the car right now said that the mass airflow sensor had leaves in it but he cleaned them out and the car ran a little better for a few minutes and then started actiing up again.
I am exhausted with the thought of what is causing the issues. Please help!
Dec 10, 2008 at 3:23 PM
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RHALL77
  • ASE Certified Mechanic
  • 3,361 POSTS
  • ASE Certified Mechanic
have him check the cat converter and see if it is plugged up. it is common for them to do that
Dec 10, 2008 at 5:18 PM
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