Question about 2003 Chevrolet Impala

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02 impala slow acceleration and slight overheating

I have a 02 impala that is having trouble accelerating. the veh only accels when the gas pedal is no more than half, but it accels very slow. the car hasn't gotten to red temp but it gets about 3/4 the way there. also car is making high pitch noise coming from the engine. when i stop driving it seems that the cooling system is being over worked i can see the recovery hose swaying back and forth. i changed thermostat to see if it would help but didn't. can't figure it out

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  • atx_5360707 Aug 04, 2009

    For all ya'll who answered nice tries but they haven't been right. I know whats wrong with it but i'm still curious if any body else can figure it out. hints not head gasket or cat

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6 Answers

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Take it to your dealer and see if it's your catalytic converter.... thats what mine was " on the power issue "

Posted on Aug 02, 2009

  • EMINEM32169 Aug 02, 2009

    the cat converter has a warranty on it 8yr 80000 miles... i just got mine replaced last week

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Have you check your MAF Sensor. Usually they cause poor accel and when really bad no start.

Posted on Feb 11, 2010

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Try changing the fuel filter yet?
Is there any codes in the ECM making the check engine light to stay on?

Posted on Aug 09, 2009

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One way to test to see if it's the catalytic converter, which it sounds like to me".... is to remove the exhaust pipe from the inlet to the converter and wire it up so you can test drive it for a block or so. It will be very noticeably more peppy and will not overheat. This is what was my car's issue was and a new converter solved it.

Posted on Aug 09, 2009

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You have to check the accelerator springs if they are bend to much you have to replace them .Then check the fuel pump in the carburetor assembly.Because may be the fuel pump is giving less gas to the engine.that's why the engine can't function normally .Where it is affecting the the engine to over heat .the cooling system don't have a problem with that its in the accelerator assembly.

Posted on Jul 29, 2009

  • ronald jimenez
    ronald jimenez Aug 05, 2009

    if it is sir then you need lubrication ,because there is an fuel dilution .Water is mixed with fuel or gas that's why loud noise.

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If the anti-freeze is foamy or doesn't look like really clean, it may be that the head gasket is blown.

Posted on Jul 29, 2009

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SOURCE: 02 chevy impala doesn't accelerate well

Hi it sounds like you have a clogged catiladic converter try changing that.

Posted on Aug 30, 2009

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It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

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http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

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http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

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Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

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Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

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2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

-----------

Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

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Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End?

http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

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http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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It can be fuel pressure issue or it's the problem with accelerator pedal or its clogged filters causing there.

There are many other possibilities. I suggest you to go through the list of help links mentioned below, these will help you to confirm where the actual fault lies: -------

Jerks and Hesitates During Acceleration?

http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html

-----------

Loss of acceleration?

http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

---------

Headlights flickering and car hesitates to start?

http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

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How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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How exactly Vehicles Accelerator Pump Diaphragm Works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

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2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration?

http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

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http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

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2009 Chevy impala accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

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It can be fuel pressure issue or its the problem with accelerator pedal or its clogged filters causing there.
There are many other possibilities.I suggest you to go through the list of help links mentioned below,these will help you to confirm where the actual fault lies:-------
Jerks and Hesitates During Acceleration? http://technoanswers.blogspot.in/2012/07/2004-dodge-town-country-jerks-and.html
-----------
Loss of acceleration? http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

---------
Headlights flickering and car hesitates to start? http://howtobyme.blogspot.in/2012/02/headlights-flickering-and-car-hesitates.html

--------
How exactly the Vehicles Accelerator Cable works?

http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

-------------
How exactly Vehicles Accelerator Pump Diaphragm Works? http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

--------
2000 Toyota Avalon: Engine Lean Codes and Knock Sound on Acceleration? http://whatisbyme.blogspot.in/2012/05/2000-toyota-avalon-engine-lean-codes.html

---------
2004 Toyota Avensis: Acceleration And Deceleration makes noise on Front End? http://whatisbyme.blogspot.in/2012/05/2004-toyota-avensis-acceleration-and.html

---------
Wheel hop under hard acceleration? http://technoanswers.blogspot.in/2012/04/wheel-hop-under-hard-acceleration.html

--------
2009 Chevy impala accelerator pedal sensor? http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

---------
Nissan Pathfinder stalls and bucks on Acceleration? http://technoanswers.blogspot.in/2012/02/nissan-pathfinder-stalls-and-bucks-on.html

--------
Acceleration lag problem? http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

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These details will help.
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Click the link below to troubleshoot this problem: ---
Car loses power while acceleration? http://schematicsdiagram.blogspot.com/2011/12/car-loses-power-while-acceleration.html

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http://technoanswers.blogspot.in/2012/02/loss-of-acceleration.html

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Acceleration lag problem?

http://repairhelpcenter.blogspot.com/2012/01/acceleration-lag-problem.html

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http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-cable.html

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http://repairhelpcenter.blogspot.com/2011/11/how-exactly-vehicles-accelerator-pump.html

----------
accelerator pedal sensor?

http://technoanswers.blogspot.in/2012/02/2009-chevy-impala-accelerator-pedal.html

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02 chevy impala doesn't accelerate well


Hi it sounds like you have a clogged catiladic converter try changing that.

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