Question about 2002 Chevrolet Impala

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2002 Impala 3.8l v6 major hesitation

I have a 2002 with the 3.8l v6 and while moving, when I step on the gas to go, it's like the car bogs down very badly and doesnt want to go. I've changed the fuel filter and the throttle position sensor.

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Have someone do a back pressure test on you catalytic converter. I had the same problem and it turned out that my converter was almost completely plugged. I was also getting a check engine light indicating a misfire on cylinder 4. Once the converter was replaced, the problems went away.

Posted on Oct 10, 2008

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Same here. Cylinders 1 and 6 were misfiring; after I had replaced my spark plugs, air filter and fuel filter my mechanic determined that the cat converter was completely plugged. I got it replaced and it runs good as new.

Posted on Feb 03, 2010

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I was having the same problem and it was the catalytic convertor--

Posted on Jan 19, 2010

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SOURCE: 3.8L Major Hesitation

the 2001-2002 3.8L V6 Naturaly Asperated (RPO L36 - Vin K) engines experience a problem when the front endcone insulation from the catalytic converter breaks away and blocks the front of the first catalyst brick preventing free flow of exhaust gas through the converter. GM has issued a special policy adjustment extending the warrenty of the catalytic converter for 10 yrs or 120,000 miles regardless of ownership. a dealer will replace it at no cost! take it in. i just did and my car runs like new!

Posted on Jun 19, 2009

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Bogs down at high acceleration


Sounds like a plugged catylic convertor, GM has a Special Policy adjustment that covers the catylic convertors for 10 years or 120,000 miles (190,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership. This is for 2001-2002 models with 3.4L or 3.8L engines. If you have a 3.8L engine you want to get this fixed soon, I have seen people drive these things so long with the convertor plugged that they melt a hole in the plastic intake plenum where the EGR port comes into the intake behind the throttle body.

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3.8L Major Hesitation


the 2001-2002 3.8L V6 Naturaly Asperated (RPO L36 - Vin K) engines experience a problem when the front endcone insulation from the catalytic converter breaks away and blocks the front of the first catalyst brick preventing free flow of exhaust gas through the converter. GM has issued a special policy adjustment extending the warrenty of the catalytic converter for 10 yrs or 120,000 miles regardless of ownership. a dealer will replace it at no cost! take it in. i just did and my car runs like new!

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Wow, I just went through the same problem and guess what it was a clogged converter and a bad oxyegen sensor. The garaged fixed it up for me by putting an eco converter on it and a new O2 sensor. I have a 2003 Chevy Impala,V6 3.8 engine. Good Luck!!!!

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