Any GM service techs. Or a tech that can help. 2001 Impala

[LowBuckX]

My wifes 2001 Impala is on the fritz I cant figure it out. Impala LS 3.8 auto
It is a total dog Nothing over 2000 rpm if you floor it it will doggidly run up to 4000 rpm them detonate hard. This has progressed for about 2 weeks now.

I did plugs and wires and fuel filter and it didnt help at all.

Help and thanks

[MoeBawlz]

could be many things, id get a scanner on it and see waht pops up.

im gonna say somethin like cam sensor or somethin to do with the fuel curve (MAF, TPS, etc)

[LowBuckX]

Document ID# 1222414
2001 Chevrolet Impala


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Service Engine Soon (SES) Light On, Reduced Vehicle Performance, Acceleration and Top Speed (Replace Catalytic Converter and Brake Vacuum Booster Hose with Thermo Protection) #03-06-05-002 - (Jan 13, 2003)
Service Engine Soon (SES) Light ON, Reduced Vehicle Performance, Acceleration and Top Speed (Replace Catalytic Converter and Brake Vacuum Booster Hose with Thermo Protection)
2001-2002 Chevrolet Impala

with 3.8L V6 Engine (VIN K -- RPO L36) and

RPO's 9C6 Taxi Cab, 9C1 Police Car and/or 9C3 SEO Vehicle Police Car, Limited Content

Condition
Some customers may comment on the SES light on and/or reduced vehicle power, acceleration and reduced top speed.

Cause
This condition may be caused by a restriction in the catalytic converter.

Correction
Follow the service procedure below for diagnosis and replacement of the catalytic converter.

For diagnosis of the catalytic converter, refer to Restricted Exhaust, SI Document ID #685978.
Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle SI Document ID #692668.



Disconnect the heated oxygen sensor (HO2S) electrical connector.
Remove the exhaust manifold pipe stud nuts.
Remove the rear catalytic converter bolts.
Remove the two rear converter hangers.
Remove the 3-way catalytic converter.
Remove the converter gasket and seal and discard.
Remove the heated oxygen sensor (HO2S) from the old converter using J 39194 Oxygen Sensor Wrench or equivalent and properly discard the old converter.
Important: The 3-way catalytic converter is serviced by replacing the entire assembly. Always replace the gasket at the front flange when servicing the 3-way catalytic converter assembly. Never install the original gasket.


Install the heated oxygen sensor (HO2S) into the new converter, P/N 10337610, using J 39194 Oxygen Sensor Wrench or equivalent.
Install a new exhaust manifold to converter pipe gasket, P/N 12565634.
Install a new converter pipe to muffler pipe gasket, P/N 10275205.
Install the converter to the vehicle.
Attach the two rear converter hangers.
Install the catalytic converter rear bolts.
Install the front catalytic converter nuts.

Tighten

• Tighten the exhaust manifold pipe stud nuts to 32 Nm (24 lb ft).

• Tighten the catalytic converter bolts to 45 Nm (33 lb ft).

Connect the heated oxygen sensor (HO2S) electrical connector.
Lower the vehicle.
Important: When replacing catalytic converter, P/N 10337610, you MUST REPLACE the brake vacuum booster hose with thermo protection sleeve, P/N 10336627.


Remove the brake booster vacuum hose and discard.
Install the new vacuum booster hose with thermo protection sleeve, P/N 10336627.
Inspect the exhaust system for leaks.
Parts Information
Part Number
Description
Qty

10337610
Catalytic Converter
1

12565634
Gasket, Front Manifold to Converter
1

10275205
Gasket, Rear Converter to Muffler
1

10336627
Brake Vacuum Booster Hose with Thermo Sleeve
1

[gen3bu]

is the mil on?

[zbugger]

Shawn, are those the symptoms? My sister's car was doing something similar and it turned out to be the ignition coil. It drove me nuts.

[LowBuckX]

swapped converter today and its good to go.. thanks.