2002 Chevy Impala Loss of Power

Tiny
JERADWARE
  • MEMBER
  • 2002 CHEVROLET IMPALA
Engine Performance problem
2002 Chevy Impala 6 cyl Automatic 105000 miles

My 2002 chevy impala has lost a lot of power. It accelerates strangely. If you put the petal down all the way the rmp's get high but the car doesn't accelerate as much as it should be. I know the intake manifold gaskets are leaking and I have scheduled to have them replaced. I recently have changed the spark plugs, wires, air filter and fuel filter. The car is not throwing any check engine lights. The problem came out of nowhere it went from accelerating normally to this.

Thanks
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Tuesday, April 1st, 2008 AT 9:57 PM

3 Replies

Tiny
RHALL77
  • MEMBER
Sounds like you have a cat converter plugging up. I would have that checked. Does it loose power more when it warms up.
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Wednesday, April 2nd, 2008 AT 7:22 AM
Tiny
JERADWARE
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I'm not sure if it's better when its first cold. I've been letting the car warm up
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Wednesday, April 2nd, 2008 AT 1:24 PM
Tiny
IGGI71
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2000 Chevy Impala P0404 & P0403 codes.

Posted at Fri Feb 22, 2008 4:19 pm
By iggi71, New to the forum
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Engine Performance problem
2000 Chevy Impala 6 cyl Front Wheel Drive Automatic 120000 miles

I have spent sometime reserching your site (and others) trying to solve the problem.

My car doesn't accelerate/has no power especialy when I'm on HWY. Check engine light showed P0404 first time and after reseting P0403 code)
Don't go any faster when I push the gas pedal down. I have also noticed drop in fuel economy.

Did a tune-up. No changes

Suspect Fuel Pump, O2 sensors or Catalytic Converter.

Please advise. Thanks

MY SOLUTION

Problem was solved by changing Cat Converter ($250) in Maineken. After Mech. Chaged Cat Converter, he spead some cleaner in to the Trottle. Engine on

See what I have tried before I changed Cat Converter:

1. I have changed Mass Air Flow Sensor. Didn't solve the problem. Put my old sensor back

2. Cleaned EGR valve. Problem was still there

3. Checked Fuel Pump pressure. It was OK

Desided to change Cat Converter. Problem was solved. Now car has so much power. WOW
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Thursday, April 3rd, 2008 AT 11:35 AM

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