Impala high pitch whistle when step on gas

[j cAT]

Originally Posted by gmtech79

I am not the one that said what you originally quoted. I simply stated how I do it.

Sent from my Droid X. Typos probable.

If you have all the proper test equipment at hand you would do it with the test equipment like you do...That would be another way to properly diagnose this.

most asking about this obviously do not have any test equipment..

A plugged exhaust with just a small amount engine work experience is not that complex..to figure out ...

I also use a vacuum guage to check out problems with the original poster issues....having that knowledge to interpret the readings is a very cheap but though way of seeing whats wrong with the engine..

It would be great if he posts back what he did and how the issue was resolved...

[Arathi]

Originally Posted by Tech II

Try this:

From a dead stop, LIGHTLY ACCELERATE up to 50 mph.....does the car shift and slowly get up to speed?

Very slowly. lol Up a *slight* hill, I don't get past 30.

Originally Posted by Tech II

now, from a dead stop, LAY INTO THE ACCELERATOR PEDAL.......Does the car bog down, not shift, and not rev higher than 3K rpms?

Bogs down, engine revs high but very little for acceleration.

Originally Posted by Tech II

Googled this, and came up with, The special policy number 05551 ......10/120K.....go to your local Chevy dealer and ask for a copy of 05551, and see if your vehicle's VIN applies to this.....if it does the cat is covered....

"Some customers of 2001-02 Chevrolet Impala, Monte Carlo; Pontiac Grand Prix; and Buick Regal model vehicles, equipped with a 3.4L (RPO LA1 - VIN E) or 3.8L (RPO L36 - VIN K) V6 engine, may experience a condition where the vehicle exhaust catalytic converter is replaced due to complaints of lack of power or illumination of the Malfunction Indicator Lamp (MIL). This may be due to the front endcone insulation from the catalytic converter breaking away and blocking the front of the first catalyst brick and preventing the free flow of exhaust gas through the converter."

Involved are all 2001-02 Chevrolet Impala, Monte Carlo; Pontiac Grand Prix; Buick Regal model vehicles, equipped with a 3.4L (RPO LA1 - VIN E) or 3.8L (RPO L36 - VIN K) V6 engine and built with the VIN breakpoints shown:
2002 Chevrolet Impala 29100001 - 29374833
Source(s):

Special Policy Adjustment - Catalytic Converter # 05551 - (Sep 14, 2005)


Or call GM customer Service, and ask them to look up the special policy number 05551, and give them the VIN, to see if you qualify....

Awesome, thank you! My last digits of my VIN start with 291xxxxx so I'll be calling today to see if I am covered!

[Arathi]

Ugh... Fail....

This special policy covers the condition described above for a period of 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.

I'm at 266,000km....

So.... Now need to figure out replacement?

[EDIT]: I figured wouldn't hurt to contact them anyways, just in case. Can make the case that this is actually my first Chevy. Maybe they'll be nice. lol

[j cAT]

Originally Posted by Arathi

Ugh... Fail....

I'm at 266,000km....

So.... Now need to figure out replacement?

[EDIT]: I figured wouldn't hurt to contact them anyways, just in case. Can make the case that this is actually my first Chevy. Maybe they'll be nice. lol

have the muffler shop drop the exhaust and make sure that the muffler has no cat pieces stuck in there ! I would replace the whole exhaust if it is in fair to bad condition...

Like was mentioned before ...before replacing any converter make sure the fuel management system is working and the the ignition system is producing a strong spark..to new correct spark plugs ...wires can mess this up...