I need help!
05-25-2009, 09:59 PM
#1
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Join Date: 06-25-2008
Location: Anderson/SC
Posts: 43
I need help!
Does your car dump boost with the t/c off? I have a automatic with the stage kit install and everytime I leave off idle it spins then dumps boost then recovers quickly. This is extremely annoying. 
05-26-2009, 10:46 AM
#3
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Join Date: 06-25-2008
Location: Anderson/SC
Posts: 43
I recently had the stage kit installed. During the first test drive I left off idle to full throttle, major spinning with about 24# of boost, then it nosed over with no boost like t/c was active(it was disabled). I have tried different types of acceleration and it only noses over while sitting or barely rolling full throttle hits. I looked at the tmap plug but I am not really sure how much room I need between the pipe and plug.
05-27-2009, 02:34 AM
#4
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Join Date: 06-29-2008
Location: Omaha, NE
Posts: 166
Word is on the forum is that this is a result of the sensor bumping a nearby pipe that causes all boost to drop and then come back. Said to be a reult of the engine rocking in the bay. Check around site for similar or someone might post.
05-27-2009, 05:23 AM
#5
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Join Date: 02-20-2009
Location: Charleston, S.C.
Posts: 596
Read this thread
https://www.chevyhhr.net/forums/2-0l-performance-tech-46/stage-kit-map-hitting-ac-looks-resolved-23550/
And this one
https://www.chevyhhr.net/forums/hhr-ss-45/stage-t-map-still-hitting-ac-compressor-why-23398/
And this one
https://www.chevyhhr.net/forums/2-0l-performance-tech-46/important-non-tsb-stage-kit-install-23290/
https://www.chevyhhr.net/forums/2-0l-performance-tech-46/stage-kit-map-hitting-ac-looks-resolved-23550/
And this one
https://www.chevyhhr.net/forums/hhr-ss-45/stage-t-map-still-hitting-ac-compressor-why-23398/
And this one
https://www.chevyhhr.net/forums/2-0l-performance-tech-46/important-non-tsb-stage-kit-install-23290/
05-27-2009, 10:37 AM
#6
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Join Date: 06-25-2008
Location: Anderson/SC
Posts: 43
I called the tech today and he said there wasn't a bulletin on my issue. "Hyper V6" wrecked his car so I wasn't sure if his problem was the same as mine.
I also crawled under the car yesterday and saw where I have only about 3/4," maybe between the tmap sensor and the air conditioning.
I also crawled under the car yesterday and saw where I have only about 3/4," maybe between the tmap sensor and the air conditioning.
06-03-2009, 11:32 PM
#8
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Join Date: 06-25-2008
Location: Anderson/SC
Posts: 43
I think I have found the issue. After checking the DejonPowerHouse site, I saw where sometimes you can have a overboost issue where your car goes into LIMP mode. The part is on the way!! Thanks for the suggestion.
06-04-2009, 11:20 AM
#10
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Join Date: 06-25-2008
Location: Anderson/SC
Posts: 43
"Over-Booster" *This is directly off their site.*
Over-Booster as shipped
Installed on Left IC Pipe
The ECM reads intercooler pipe air pressure and temperature from the IAT2 sensor. If you are using a manual boost controller with a race tune (such as Wester's) and exceed 23 psi for 3seconds, the ECM closes the throttle to about 45% to limit power (often called "limp mode"). With the Over-Booster device mounted on the left IC pipe, the boost pressure seen by the IAT2 sensor will be about 10% lower that actual and the ECU will not go into "limp mode". This allows the driver to increase actual boost pressure for more torque and HP (we run 25psi now via a manual boost controller). It consists of an aluminum block, hoses and fittings. Boost pressure enters a chamber in the block where the IAT2 sensor is re-mounted and a small amount of air is bled off into the intake pipe, lowering the chamber pressure. You will have to drill and tap a 10-32UNF hole in your intake pipe for the fitting. It can be easily removed and replaced when desired.
You will also need to increase fuel delivery at wide open throttle with changes to the ECM's power enrich table because commanded AFR is based on the lower pressure seen by the IAT2.
Over-Booster -SSA Price $49.95
Over-Booster as shipped
Installed on Left IC Pipe
The ECM reads intercooler pipe air pressure and temperature from the IAT2 sensor. If you are using a manual boost controller with a race tune (such as Wester's) and exceed 23 psi for 3seconds, the ECM closes the throttle to about 45% to limit power (often called "limp mode"). With the Over-Booster device mounted on the left IC pipe, the boost pressure seen by the IAT2 sensor will be about 10% lower that actual and the ECU will not go into "limp mode". This allows the driver to increase actual boost pressure for more torque and HP (we run 25psi now via a manual boost controller). It consists of an aluminum block, hoses and fittings. Boost pressure enters a chamber in the block where the IAT2 sensor is re-mounted and a small amount of air is bled off into the intake pipe, lowering the chamber pressure. You will have to drill and tap a 10-32UNF hole in your intake pipe for the fitting. It can be easily removed and replaced when desired.
You will also need to increase fuel delivery at wide open throttle with changes to the ECM's power enrich table because commanded AFR is based on the lower pressure seen by the IAT2.
Over-Booster -SSA Price $49.95