Or anyone who is able to, anyway you could pm or post any and every recall or tsb for the ss/tc? My car is definitely having issues now, and I'm pretty sure it's not tune related. It's just not holding boost, and last night it went up to 22, and just fell down to 10. And driving it today and last night, it just wasn't making the power it normally does. After this weekend I'm probably going to take it in to get looked at, and it would be helpful if I at least knew some common problems, searching has brought me nothing. Help a girl out! Thanks. :)

boost leak?

boost leak?

thats good that you want to learn about your car but if its warranty does it really matter as long as its fixed?

Not a GM employee but your problem sounds like it MIGHT be one of the following:


Charge piping has come loose from the throttle body. Follow the piping up from the passenger side of the intercooler and try to pull up as hard as you can up to see if it's sealed tight around the TB. It's a pain in the ass to get to but you can't miss where it hooks up.
On the passenger and driver side check your charge piping to make sure it's NOT rubbing on the huge bolts popping up from the lower frame. If you look down on the driver's side you can't miss it...passenger side more difficult. Mine only has about 1.5 inches of clearance on the driver's so if your charge piping has sagged it might have punctured through.


Beyond that if you're losing that much boost with no CEL the only other thing I could think of is the charge piping seal around the turbo itself.

Yes I would like to know what's wrong with my car lol. Doesn't seem like your typical boost leak, everything is super tight. It also is an intermittent problem, it doesn't happen ALL of the time, but it seems to be getting more frequent.

#09-06-93-004: Intermittent MIL/Check Engine Light On, DTC P0299 or P0234 Set (Adjust Turbocharger Wastegate Actuator) - (Jul 21, 2009)
#PIP4669: Intermittent DTC P2261 Setting - keywords air boost cac charge chevrolet control cooler driveability ecm engine gas hole intermittent inf low maf map mil pipe power reduced reducedpwrmde ses turbo - (Jul 7, 2009)
#PIP4559: DTC P2227 After Turbo Upgrade Kit Installation - keywords accessory air boost cal calibration cel charge control cooler driveability DTC ECM engine gas leak inf low MAF MAP MIL PCM performance power - (Jan 13, 2009)
#PIP4520: Low Boost / Power And/Or DTC P0299 Or P0101 - keywords actuator boost CAC charge control cooler driveability DTC ECM engine gas lnf low maf MIL reduced reducedpwmde SES wastegate - (Nov 4, 2008)
#PIP4485: Low Boost, Reduced Power and/or DTC - keywords air cac charge control cooler driveability ecm engine gas hole lnf low maf mil P0101 P0299 P2178 pipe power reduced reducdpwrmde rub ses start stall - (Sep 26, 2008)
#07-00-89-058C: Astra - New Model Features and Service Guide - (Sep 11, 2008)
#PIC3385E: Repeated Park LPS Fuse Open (Additional Information) - keywords B2585 B2585-06 B2625 B2625-02 BCM brake DTC dimming hazard IPC MIL repeat STG SYS - (Aug 14, 2008)

Or anyone who is able to, anyway you could pm or post any and every recall or tsb for the ss/tc? My car is definitely having issues now, and I'm pretty sure it's not tune related. It's just not holding boost, and last night it went up to 22, and just fell down to 10. And driving it today and last night, it just wasn't making the power it normally does. After this weekend I'm probably going to take it in to get looked at, and it would be helpful if I at least knew some common problems, searching has brought me nothing. Help a girl out! Thanks. :)

No recalls I know of that could cause that, three issues Ive seen and at least one of them has a information notice about is: charge piping rubbing on the radiator support bolts(Steddys car did this, and was even worse with Hahn piping), nipple breaking off charge piping near TMAP, and only other boost realted thing ive seen is a broken wastgate valve. The nipple breaks off the valve and has to be replaced.

I would prepare to lose your tune if I were you though....updating the ECM calibration is common practice at some dealers for drivability issues, and its recommended for several codes.

Ill look it up on alldata right now

Ok i just looked on alldata and their is a page of probably 30 tsb's

Here ya go buddy enjoy

01-07-30-036H 01/29/2009 A/T Control - DTC P0756 Diagnostic Tips
00-00-90-002J 01/28/2009 Tires - Correct Inflation Pressure Information
07-08-98-001A 01/28/2009 Body - Non-Approval of Clipping For Collision Repair
05-03-10-020B 01/22/2009 Tire - Use Of Nitrogen Gas In Tires
09-08-67-001 01/06/2009 Body - Rattling Noise From The Sunroof Area
01-06-01-011E 12/18/2008 Gasoline Engine - Oil Consumption Guidelines
08-06-04-033C 12/18/2008 Engine Controls - Aftermarket Calibration Identification
08-08-42-005A 12/17/2008 Lighting - Headlamp Replacement Guidelines
06-08-50-009C 12/12/2008 Restraints - Passenger Presence Sensing System Info.
08-08-44-032 12/10/2008 Audio System - iPod(R)/iPhone(R) Won't Connect To Radio
06-09-41-004H 12/03/2008 Interior - Passenger Air Bag Is Not Flush With Dash
00-03-10-006D 11/26/2008 Tires - Radial Force Variation (RFV) Info.
07-03-10-008A 11/26/2008 Tires - Slight/Mild Edge Feathering Information
03-03-10-007D 11/24/2008 Wheels/Tires - OE Tire/Wheel Characteristics
07-03-10-013D 11/24/2008 Wheels/Tires - Vibration While Driving
08259A 11/06/2008 Campaign - Inoperative OnStar(R) System
07-07-30-010A 10/30/2008 A/T Controls - Snapshot Data Upload Information
08-06-03-009A 10/29/2008 Electrical - Reducing Intermittent Electrical Concerns
06-08-50-005C 10/01/2008 Interior - Seat Cushion Cover Is Loose
00-00-89-027E 09/29/2008 Interior - Elimination Of Unwanted Odors
08-08-44-010D 09/29/2008 Navigation Radio - Diagnostic Information
01-07-30-032E 09/29/2008 A/T - 4T65E Fluid Leaking From A/T Vent
08-08-46-006 09/25/2008 Audio System - XM(R) Terrestrial Repeater Changes
06-08-44-012C 09/18/2008 Navigation System - DVD Navigation Updates Program
06-06-93-001E 09/15/2008 Engine - Ticking Noise On Cold Start Up (Normal)
06-08-111-004A 09/15/2008 Body - Exterior Emblem Discoloration/Blistering/Peeling
05-03-10-005D 09/11/2008 Wheels/Tires - Upsized Wheel/Tire Characteristics
02-08-42-001C 09/05/2008 Lighting - Headlamp Polycarbonate Lens Damage Prevention
07-03-10-016C 08/29/2008 Wheels/Tires - Required Label When Changing Wheels/Tires
08-08-44-028 08/28/2008 Audio - Inadvertent Steering Wheel Button Activation
03-08-48-006E 08/25/2008 A/C - Rear Window Defroster Grid Contact/Tab Repair
08-07-30-039 08/21/2008 A/T Controls - Service Fast Learn Adapts Characteristics
08-08-126-001 08/15/2008 Navigation Radio - XM NAV(R) Traffic Coverage Areas
08-09-41-002A 08/14/2008 Restraints - Air Bag Lamp ON/Various DTC's Set
08-08-46-004 08/14/2008 OnStar(R) - Aftermarket Device Interference Information
08-08-44-026 08/11/2008 Audio System - Refurbishing Radio Faceplates/Knobs
08-07-30-035 08/08/2008 A/T - Water Or Coolant Contamination Information
05-06-04-022E 08/06/2008 Fuel System - TOP TIER Detergent Gasoline (Canada)
06-03-09-005B 07/30/2008 Suspension - Rear End Squeak/Squawk on Low Speed Bumps
02-06-03-008D 07/21/2008 Charging System - Low Voltage Display/Battery Discharged
04-06-04-047H 06/24/2008 Fuel System - 'TOP TIER' Detergent Gasoline Information
08-08-64-011 06/23/2008 Mirrors - Heated Mirror Defrosting Time
08-08-44-023 06/18/2008 Navigation Radio - Adaptation After Radio/Battery R&R
07-03-16-004A 06/18/2008 Tire Monitor System - FAQ/Diagnostic Information
05-00-89-072B 06/17/2008 Engine/Fuel System - Oil/Fuel Additive Information
99-04-20-002E 06/06/2008 Drivetrain - Driveline Clunk Information
08-07-30-026 05/22/2008 A/T - Slight Vehicle Movement In Park At Start Up
07-08-49-020B 05/22/2008 Instruments - IPC Odometer Programming Reference Guide
08-03-10-007 05/16/2008 Tires - Minimizing Damage to TPM Sensors
01-07-30-010C 05/12/2008 A/T - Torque Converter Replacement Information
08-03-16-003 05/12/2008 Tire Monitor System - TPM Sensor Information
00-05-22-002K 05/06/2008 Disc Brakes - Warranty Service and Procedures
01-08-42-001F 05/02/2008 Lighting - Exterior Lamp Condensation Guidelines
03-07-29-004E 05/02/2008 M/T - Operating Characteristics of Manual Transmissions
08-03-10-005 05/01/2008 Wheels/Tires - Chrome or Chrome Plated Steel Valve Caps
08-03-10-006 05/01/2008 Wheels/Tires - Tire Slowly Loses Air/Low Tire Message
02-06-03-009C 04/17/2008 Electrical - Battery Charging Tips/Recommendations
05-06-03-002C 04/17/2008 Battery/Charging System - Electrical Diagnostics Info.
00-06-01-012C 04/14/2008 Engine - Use of 'Surface Conditioning Disks'
08-06-01-008 03/27/2008 Engine - Accessory Drive Belt Noise Diagnostics/Tool
08-03-10-004 03/25/2008 Wheels/Tires - Accessory Wheel/Tire Mounting/Balancing
08-08-51-002 03/12/2008 Body - TPO Fascia Cleaning Prior to Painting
04-08-50-006B 01/25/2008 Interior - Seat Cover Wrinkle/Crease/Crack/Burn Info.
06-00-89-029D 01/10/2008 Interior - Cleaning of The Interior Surfaces

No recalls I know of that could cause that, three issues Ive seen and at least one of them has a information notice about is: charge piping rubbing on the radiator support bolts(Steddys car did this, and was even worse with Hahn piping), nipple breaking off charge piping near TMAP, and only other boost realted thing ive seen is a broken wastgate valve. The nipple breaks off the valve and has to be replaced.

I would prepare to lose your tune if I were you though....updating the ECM calibration is common practice at some dealers for drivability issues, and its recommended for several codes.

Hmmm I have a stock ecu and tuned ecu? Which should I have in when they're check it out?

Wow i wasnt expecting it to post so many this damn site pisses me off sometimes, anyways thats all the tsb's listed. It does tell you the fix for everything but it wont let me copy it.

Heellp!! :( Also it doesn't throw any codes, and I've had it scanned twice.

It did on all stock, psykosteve, and terminator tunes?

Didn't have the Terminator tune on long enough to know, stock it did a few times, I'm going to put that ECU in tomorrow and see how it is. I really don't think it's the tune though.

Would a clogged cat increase or decrease boost?

increase

idk from what I was reading it'll decrease it

Reading where. POST!! lol

Lol from where? Post!!! ...this site is being gay again

hey didn't you just have an oil change?

Yours sounds simliar

http://forums.fourtitude.com/zerothread?id=4270078&postid=55726843

I did just have an oil change, and my vin fits into the range of cars affected by the Recall. I should have that checked out.

wat do u normally spike boost at? and wat does it usually hold?
stock dp?

Stock dp, it doesn't spike, it goes up to 22 and holds.

o then its a boost leak for sure. didnt u change ur intake lately? u check all ur t-bolt clamps? all of them dont b lazy

No the new intake is not on yet, I haven't checked quite everything yet to make sure it's tight. There's a recall that my car fits into, and a couple TSB's that could have the cause.

I can probably check the piping this Saturday

Or anyone who is able to, anyway you could pm or post any and every recall or tsb for the ss/tc? My car is definitely having issues now, and I'm pretty sure it's not tune related. It's just not holding boost, and last night it went up to 22, and just fell down to 10. And driving it today and last night, it just wasn't making the power it normally does. After this weekend I'm probably going to take it in to get looked at, and it would be helpful if I at least knew some common problems, searching has brought me nothing. Help a girl out! Thanks. :)


Service Information 2008 Chevrolet Cobalt | Cobalt, G5 (VIN A) Service Manual | Document ID: 2195686
--------------------------------------------------------------------------------

#PIP4485: Low Boost, Reduced Power and/or DTC - keywords air cac charge control cooler driveability ecm engine gas hole lnf low maf mil P0101 P0299 P2178 pipe power reduced reducdpwrmde rub ses start stall - (Sep 26, 2008)


Subject: Low Boost, Reduced Power and/or DTC


Models: 2008-2009 Chevrolet Cobalt SS Only




--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
If a technician encounters a low boost/power condition and/or dtc, the following may help.

Recommendation/Instructions:
When a technician encounters a low boost/power condition and/or related dtc on a 2008-09 Cobalt SS they should inspect the right side CAC-(Charge Air Cooler) pipe for contacting a radiator support bolt. Due to the location of the CAC on 2008-09 Chevrolet Cobalts a radiator support bracket bolt on the right front may make contact with the lower charge air cooler/hose from below. This contact may cause the CAC to leak boost or vacuum if a hole is present. Review the illustration to see the location of the suspect bolt. A thick washer may be added to the bolt to increase clearance.

Note: Bulletin 07-06-04-029 should be used to diagnose the charge air system when leaks are suspected. This bulletin may be aided by using the evap smoke cart to introduce smoke to the CAC system.


http://cobaltss.net/gallery/files/9/7/1/3/2195634.jpg


(1) Right lower radiator support bracket

(2) Right front lower Charge Air Duct concern

(3) This bolt will wear a hole in the Charge Air duct

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2009 General Motors Corporation. All rights reserved.


************************************************** ************************************************** ************************************************** ************************************************** **************************************************




Service Information 2008 Chevrolet Cobalt | Cobalt, G5 (VIN A) Service Manual | Document ID: 2206771
--------------------------------------------------------------------------------

#PIP4520: Low Boost / Power And/Or DTC P0299 Or P0101 - keywords actuator boost CAC charge control cooler driveability DTC ECM engine gas lnf low maf MIL reduced reducedpwmde SES wastegate - (Nov 4, 2008)


Subject: Low Boost/Power and/or DTC P0299 or P0101


Models: 2008-2009 Chevrolet Cobalt SS Only

2008-2009 Chevrolet HHR SS Only

2007-2009 Pontiac Solstice GXP

2007-2009 Saturn Sky Redline

With Engine RPO LNF Only




--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A technician may encounter a vehicle with a low boost/power condition and/or DTC P0299 and or P0101 setting. This may be the result of a cracked or broken fitting at the turbocharger assembly.

Recommendation/Instructions:
It has been determined that the nipple for the turbocharger wastegate actuator may be damaged causing this condition. If this concern is noted please inspect the area on the underside of the turbo compressor housing for the wastegate actuator solenoid valve. The nipple (see CALLOUT #1) may have been damaged causing a loss of boost pressure. It may be necessary to remove the charge air duct for a closer inspection. See eSI "Turbocharger Wastegate Actuator Replacement" for solenoid replacement procedure.


http://cobaltss.net/gallery/files/9/7/1/3/2206390.jpg


This solenoid is available separate from the turbocharger and should be replaced as a sub assembly. Do not replace the turbocharger assembly.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2009 General Motors Corporation. All rights reserved.


************************************************** ************************************************** ************************************************** ************************************************** **************************************************


Service Information
Document ID: 2312877
--------------------------------------------------------------------------------

#09-06-93-004: Intermittent MIL/Check Engine Light On, DTC P0299 or P0234 Set (Adjust Turbocharger Wastegate Actuator) - (Jul 21, 2009)


Subject: Intermittent MIL/Check Engine Light On, DTC P0299 or P0234 Set (Adjust Turbocharger Wastegate Actuator)


Models: 2008-2009 Chevrolet Cobalt, HHR

2008-2009 Pontiac Solstice GXP

2008-2009 Saturn SKY Redline

2008-2009 Opel GT

2008 Daewoo G2X

with Engine RPO LNF and LDK (Europe)

Please Refer to GMVIS




--------------------------------------------------------------------------------
Condition
Some customers may comment that the SES light is on. Upon inspection, you may find DTC P0299 (Turbocharger Engine Underboost) or P0234 (Turbocharger Engine Overboost) set.

Cause
This condition may be caused by a mis-adjusted wastegate.

Correction
Note: The wastegate adjustment is sometimes a very fine process. When adjusting the wastegate, only small adjustments should be made. Loosen one nut at a time and only adjust the nut one turn at a time; then tighten the other nut against the shaft and test drive to verify. This may have to be performed several times to achieve the desired boost level. To ensure proper adjustment, the vehicle should be at full operating temperature when testing. The vehicle will be very hot and may need to cool between adjustments. Too large of an adjustment can cause repeat DTCs.

Adjust the turbocharger wastegate. Refer to Turbocharger Wastegate Actuator Adjustment in SI.

Troubleshooting Tips for DTC P0299 - Turbocharger Engine Underboost
To increase boost, adjust the nuts (in) towards the actuator; in essence making the shaft shorter.

Troubleshooting Tips for DTC P0234 - Turbocharger Engine Overboost
To reduce boost, adjust the nuts (out) towards the end of the shaft; in essence making the shaft longer.

Warranty Information
For vehicles repaired under warranty, use:

Labor Operation
Description
Labor Time

J5799*
Turbocharger Wastegate Actuator Adjustment
Use Published Labor Operation Time

*This is a new labor operation number. The next update of the Labor Time Guide will contain this number.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2009 General Motors Corporation. All rights reserved.

Thank you!! <3

Are you saying that when you are WOT that you are not holding boost? If you are only 50% throttle for example, you are not going to hold constant boost pressure as RPM increases.

Yes WOT it won't hold it SOMETIMES. It's very strange.

put your stock ecm in and run it to see if it still does it. Then you're know whether its tune related or not..

Yup doing that again today.

Hmmm and traction control is off?

I don't mess with traction control lol.

Try next time with traction control off and see what happens.

But I've never messed with it before, and it used to be fine.

That's true

hmmmmmmmmmmmmm well I'm gonna drive around with it with the stock ecu you up until the meet on Saturday and see how it does then.

I wasn't going to post this one cause it's kind of confusing ......But if since this is intermittent ...you might want to take a look.



Service Information
Document ID: 2298191
--------------------------------------------------------------------------------

#PIP4669: Intermittent DTC P2261 Setting - keywords air boost cac charge chevrolet control cooler driveability ecm engine gas hole intermittent inf low maf map mil pipe power reduced reducedpwrmde ses turbo - (Jul 7, 2009)


Subject: Intermittent DTC P2261 Setting


Models: 2008-2009 Chevrolet Cobalt SS

2008-2009 Chevrolet HHR SS




--------------------------------------------------------------------------------

The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
A technician may find DTC P2261: Turbocharger Bypass Valve Stuck Closed set with no problem found. It may be intermittent in nature or they may find the dtc will set after a hard acceleration, usually in third gear. DTC P2261 is a type B dtc and will not set on the first drive cycle the dtc sets, therefore multiple test drives should be performed to confirm repair.

Recommendation/Instructions:
SI diagnostics for this DTC states that the ECM compares the measured MAF reading to the modeled MAF and has detected a series of pulsations in the induction system that exceed a calibrated threshold. A snapshot of "Induction Data" will show the fault, however the tech may need to compare the snapshot data to another vehicle if they are unfamiliar with the readings. They should note a fluctuation and or a difference in the desired versus requested boost level. When diagnosing this dtc pay close attention to Circuit/System testing step #1. This step has you inspecting for any vacuum leaks, damage, restrictions, improper routing or connecting of the vacuum hoses on the charge air bypass valve solenoid, the charge air bypass valve, and the charge air bypass valve vacuum tank.

We have found leaking vauum tanks causing this dtc. When testing the vacuum tank, care must be used or the results may not be valid. The vacuum tank has an integral check valve not noted in SI. To check the Vacuum Tank operation, disconnect the hose that runs from the tank to the Bypass Valve Solenoid at the solenoid and apply vacuum to the tank. The tank should be able to maintain vacuum with no decay. Note: If you remove the vacuum hose from the intake manifold and plug it and the decay stops the check valve is leaking, if the decay continues the tank itself is leaking.

Note: Front wheel drive platforms using the 2.0 Liter RPO (LNF) incorporate a charge air bypass valve supplemental vacuum tank. The purpose of the tank is to provide an instant source of vacuum to the bypass valve via the bypass solenoid (when it is commanded open by the ECM). This results in less pressure buildup under closed throttle conditions, thereby reducing compressor noise, surge and spool time.

Please follow this diagnostic or repair process thoroughly and complete each step. If the condition exhibited is resolved without completing every step, the remaining steps do not need to be performed.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer". They are written to inform these technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions, and know-how to do a job properly and safely. If a condition is described, DO NOT assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See your GM dealer for information on whether your vehicle may benefit from the information.

WE SUPPORT VOLUNTARY TECHNICIAN CERTIFICATION


© 2009 General Motors Corporation. All rights reserved.

yes I saw that one, and was considering it also, but my car has never shown a CEL so could that still be the problem?

Someone please sticky the TSBs that have been posted here, poor guys have to keep posting the same stuff over and over again because they get buried and these ones (with images) could be incredibly helpful to others :). On a side note, what in the hell were they thinking when they put that screw where they did :lol:

It Should set a code , actually all of the tsb's and PI's i posted "should" , but there are always exceptions.

Someone please sticky the TSBs that have been posted here, poor guys have to keep posting the same stuff over and over again because they get buried and these ones (with images) could be incredibly helpful to others :). On a side note, what in the hell were they thinking when they put that screw where they did :lol:


It would be nice .....I actually took the time to copy all those pics and change them to jpeg's (for the roll pin PI below ) so i could post them. About the screw ....lol.....nothing like putting a sharp pointy thing near a charge pipe lol...... that and the wastegate rod adjuster ....what a pain in the ass ... I was going to adjust the wastegate on my car but it wasn't worth the time to get to it.

yeah no codes, but it's definitely acting up, I hope it's one of these problems!! lol