EBeast

iTrader: (1)

Okay so everytime i start my car in the morning it idles high to like 1500 rpm then slowly drops back down and i mean real slow to 1k rpm. then its fine after i start driving it around. anyone know what could be the cause to high idle when i start it up or is it suppose to do that? and it never did this last month. oh btw its a 06 ss/sc 2.0.

N1ckateen

iTrader: (1)

make sure ur throttle body is nice and clean. maybe keep an eye on ur boost levels for a clogged cat?

outtamymind

thats fairly normal for all cars. might be time to clean the throttle body though

EBeast

iTrader: (1)

alright. for stock arent i suppose to be running at 12.5 lbs of boost because when i get on it now it going up to 15 lbs of boost. and how can you tell if your cat is clogged?

defo98

iTrader: (1)

if your hitting 15lbs. of boost stock but the stock gauge is not pin point accurate

outtamymind

increased boost is a good sign of a clogged cat, hesitation, chugging at a steady throttle and of course p0420

EBeast

iTrader: (1)

yep i just got that cel code p0420 thursday. crap that means new cat

outtamymind

possibly, p0420 by itself could just mean a faulty O2 sensor. but givin you think your boosting higher then normal i would say its safe to say your cat is starting to clog

EBeast

iTrader: (1)

thanks for your help! i guess now its time for some aftermarket exhaust then.

outtamymind

might as well, aftermarket exhaust is better

Malaclypse

iTrader: (1)

Your cat likely isn't clogged as you'd be having a HUGE loss of power.

The high idle up to 1,500 rpm is normal on a stone cold start. The car does this to light off the cat more quickly and reduce emissions. 15 psi of boost is just fine for stock as the computer will add or subtract boost based on outside temperatures and barometric pressure.

I was hitting 12 psi in the winter and 15 psi in the summer before I got the stage 1 setup.

defo98

iTrader: (1)

you got that backwards

rukkee

iTrader: (3)

For an SS/SC 15 PSI stock shouldn't happen . It sure sounds like a cat thats starting to clog. It was such a problem on the SC cars that GM extended the warranty on them to 10 years or 120,000 miles.

Here is the TSB OP.

Service Information
Document ID: 2382008
--------------------------------------------------------------------------------

#08020: Special Coverage Adjustment - Extended Catalytic Converter Warranty Coverage - (Jan 13, 2010)


Subject: 08020 - SPECIAL COVERAGE ADJUSTMENT - EXTENDED CATALYTIC CONVERTER WARRANTY COVERAGE


Models: 2004-2007 SATURN ION RED LINE

2005-2007 CHEVROLET COBALT SS

EQUIPPED WITH 2.0L 4-CYLINDER (RPO LSJ) ENGINE




--------------------------------------------------------------------------------
Condition
Some customers of 2004-07 model year Saturn ION Red Line; and 2005-07 model year Chevrolet Cobalt SS vehicles, equipped with 2.0L 4-cylinder (RPO LSJ) engine, may comment on illumination of the malfunction indicator lamp (MAL) and/or lack of engine power. This may be caused by failure of the catalytic converter.

Special Coverage Adjustment
This special coverage covers the condition described above for a period of 10 years or 120,000 miles (193,000 km), whichever occurs first, from the date the vehicle was originally placed in service, regardless of ownership.

Dealers/retailers are to replace the catalytic converter. The repairs will be made at no charge to the customer.

Customers should not be charged for performing a system check when it is determined that the catalytic converter is not the cause of the customer complaint. Labor code T5725 is provided to submit claims for such system checks. Any additional necessary diagnosis and repairs that are not related to the catalytic converter are NOT covered by this special coverage. The customer should be informed that any further service that is not covered by the new vehicle warranty will not be covered by this policy.

For vehicles covered by Vehicle Service Contracts, all eligible claims with repair orders on or after January 14, 2010, are covered by this special coverage and must be submitted using the labor operation codes provided with this bulletin. Claims with repair orders prior to January 14, 2010, must be submitted to the Service Contract provider.

Vehicles Involved
Involved are certain 2004-07 model year Saturn ION and 2005-07 model year Chevrolet Cobalt SS vehicles, equipped with 2.0L 4-cylinder (RPO LSJ) engine, and built within the following VIN breakpoints:

Year
Division
Model
From
Through

2005
Chevrolet
Cobalt SS
57500350
57673203

2006
Chevrolet
Cobalt SS
67600131
67887017

2007
Chevrolet
Cobalt SS
77100033
77398019

2004
Saturn
ION Red Line
4Z185538
4Z232057

2005
Saturn
ION Red Line
5Z100038
5Z181820

2006
Saturn
ION Red Line
6Z100021
6Z204142

2007
Saturn
ION Red Line
7Z100001
7Z140513


Important: Dealers/retailers using the Global Warranty Management (GWM) system are to confirm vehicle eligibility prior to beginning repairs by using the Investigate Vehicle History link on the Global Warranty Management application within GlobalConnect. Special Coverages are displayed in the Applicable Warranties section.

Parts Information
GM: Parts required to complete this special coverage are to be obtained from General Motors Service and Parts Operations (GMSPO).

Saturn US Only: Due to the limited number of affected vehicles, Saturn will not be doing a pre-shipment of parts. Retailers should order parts as needed from Saturn Service Parts Operations (SSPO).

Part Number
Description
Qty/ Vehicle

20889271
Asm, Catalytic Converter (2004 ION)
1

20889269
Asm, Catalytic Converter (2005-06 ION, Cobalt)
1

20889270
Asm, Catalytic Converter (2007 ION, Cobalt)
1

15231157
Gasket, Ctltc Conv
1

11514596
Nut, Ctltc Conv (2004 ION)
2

11517996
Nut, Ctltc Conv (2005-07 ION, Cobalt)
2

15235773
Gasket, Exhaust Manifold
1

11517996
Nut, Exhaust Manifold
3

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


Š 2010 General Motors. All rights reserved

guitarenvy

Its supposed to. PCM is trying to warm up the engine to enter closed loop o2.
The colder it is the longer it will take to idle down. Did you just buy this car or what?

Malaclypse

iTrader: (1)

That's a neg. Colder air is more dense and thus creates more power. So it takes less boost to create 260 hp/260 tq.

And to everyone else... just noticed it was an SS/SC.

The thing about idling high on a cold start still stands though.

EBeast

iTrader: (1)

maybe high idle - YouTube
this is a video of what its doing and this is normal?? Yes i did just buy this car about a month ago with 57k for $7600 pretty good price i got it at. Well when i did get on it today on my way home from work it started to like heistant and chugging when i slammed the on the gas.

defo98

iTrader: (1)

the air is more dense yeah your going to make more boost in cooler air then you are in hot air

xbobbitox

Hmm well if you have your check engine light on for cat issues just get a new cat, done.

EBeast

iTrader: (1)

yeah im going to get a full aftermarket system since it needs replaced anyways. as for the video i just didnt know that it was suppose to do that because it never did that in my dakota so just curious on that but thanks everyone for helping me out!