Finally..
Thread Starter
Member
Joined: 11-20-2010
Posts: 77
From: Michigan
OK. Just trying to help here. If you're having a boost issue like you descibed in your earlier post,then a re-reflash probably won't help. If it initial boosted up to 18-19,then the reflash was good. Losing the boost later or dropping to 9 lbs as you said sounds like a leak in the system.
FWIW. Mine did the same thing. Boosted 18 on the way home from dealer. 5 miles from home, started loosing boost. Drove back to dealer and every time it tried to boost it would go to 4-5 lbs then fall on it's face. The tech looked at it and said the bottom sensor was not seated good. He pulled the sensor checked the o-ring and reinstalled. Has been fine since. 3 months.
Now. About boost pressure. Others claim 21-24. I have only seen 18-19. I made a few calls to some folks that would know. In short I was told that the 18-19 was fine. It's not how much boost, but how much power you get from the GMTU. If the car gets the power with 18-19 lbs,then thats what you'll get. Many factors come into play such as altitude,weather,air quality,etc. Maybe some of the latest upgrades have been tuned down a little by the GM reflash. Not sure. Just guessing here.
So, if you want to have it re-reflashed go ahead. BUT, I would advise looking at the sensors and/or o-rings just to be sure.
Let us know what you find out. I can always learn something new.
FWIW. Mine did the same thing. Boosted 18 on the way home from dealer. 5 miles from home, started loosing boost. Drove back to dealer and every time it tried to boost it would go to 4-5 lbs then fall on it's face. The tech looked at it and said the bottom sensor was not seated good. He pulled the sensor checked the o-ring and reinstalled. Has been fine since. 3 months.
Now. About boost pressure. Others claim 21-24. I have only seen 18-19. I made a few calls to some folks that would know. In short I was told that the 18-19 was fine. It's not how much boost, but how much power you get from the GMTU. If the car gets the power with 18-19 lbs,then thats what you'll get. Many factors come into play such as altitude,weather,air quality,etc. Maybe some of the latest upgrades have been tuned down a little by the GM reflash. Not sure. Just guessing here.
So, if you want to have it re-reflashed go ahead. BUT, I would advise looking at the sensors and/or o-rings just to be sure.
Let us know what you find out. I can always learn something new.
Senior Member
Joined: 11-08-2009
Posts: 220
From: Los Angeles, Dallas, New York
I believe if you've never had trouble with the Stage 1 your either lucky, you have the best tech in the world, or it hasn't happened yet.
Now before someone says whoa is me, or whatever silly response I get, the deal is I've changed to a harder top motor mount, had the contacts soldered, then went with Crate Engine Depots plug and play which means I bought a whole new harness, read everything I could find, data logged it through Vince, now switched to HP tuners and that's all I can remember at the moment, though I did all of this on my own money, not asking GM or the dealer for a nickle.
Word of advice and not to be adversarial with the dealer, because I believe some dealers are very good and GM, especially lately, is trying their best to get things right on all gm cars.
Regardless, I would do this:
1. Document everything, everyone you talk to, every response, when you bring in internet schematics or information make two copies, date each one, etc. This may sound like your being paranoid, but this way you have a complete record of your efforts and what is expected, even promised.
If you do have an issue and you've kept documentation, this will put you in the front of the line and hopefully get you beter service.
At places like the Chevy Manager's shop or Findlay Chev. in Vegas, or Reliable Chevrolet in Richardson Texas, you don't need to do this because they are on top of thing, but for others . . . well you know why.
IMO
Platinum Member
Joined: 12-06-2009
Posts: 11,721
From: Alabama
For everyone that has issues with the Stage 1 upgrade, someone else doesn't.
I believe if you've never had trouble with the Stage 1 your either lucky, you have the best tech in the world, or it hasn't happened yet.
Now before someone says whoa is me, or whatever silly response I get, the deal is I've changed to a harder top motor mount, had the contacts soldered, then went with Crate Engine Depots plug and play which means I bought a whole new harness, read everything I could find, data logged it through Vince, now switched to HP tuners and that's all I can remember at the moment, though I did all of this on my own money, not asking GM or the dealer for a nickle.
Word of advice and not to be adversarial with the dealer, because I believe some dealers are very good and GM, especially lately, is trying their best to get things right on all gm cars.
Regardless, I would do this:
1. Document everything, everyone you talk to, every response, when you bring in internet schematics or information make two copies, date each one, etc. This may sound like your being paranoid, but this way you have a complete record of your efforts and what is expected, even promised.
If you do have an issue and you've kept documentation, this will put you in the front of the line and hopefully get you beter service.
At places like the Chevy Manager's shop or Findlay Chev. in Vegas, or Reliable Chevrolet in Richardson Texas, you don't need to do this because they are on top of thing, but for others . . . well you know why.
IMO
I believe if you've never had trouble with the Stage 1 your either lucky, you have the best tech in the world, or it hasn't happened yet.
Now before someone says whoa is me, or whatever silly response I get, the deal is I've changed to a harder top motor mount, had the contacts soldered, then went with Crate Engine Depots plug and play which means I bought a whole new harness, read everything I could find, data logged it through Vince, now switched to HP tuners and that's all I can remember at the moment, though I did all of this on my own money, not asking GM or the dealer for a nickle.
Word of advice and not to be adversarial with the dealer, because I believe some dealers are very good and GM, especially lately, is trying their best to get things right on all gm cars.
Regardless, I would do this:
1. Document everything, everyone you talk to, every response, when you bring in internet schematics or information make two copies, date each one, etc. This may sound like your being paranoid, but this way you have a complete record of your efforts and what is expected, even promised.
If you do have an issue and you've kept documentation, this will put you in the front of the line and hopefully get you beter service.
At places like the Chevy Manager's shop or Findlay Chev. in Vegas, or Reliable Chevrolet in Richardson Texas, you don't need to do this because they are on top of thing, but for others . . . well you know why.
IMO
If you can,will you answer my question about how the tech broke the part on the turbo?
Senior Member
Joined: 11-08-2009
Posts: 220
From: Los Angeles, Dallas, New York
I had read on these forums that the tube (not the metal nipple) could get cracked when installing and was told by gm tech it was the accuator.
Since that would have sidelined the car for weeks waiting for parts, I said look at this tube and try some silicon glue to see if it worked, it did, so they replaced the tube.
IMO
Senior Member
Joined: 10-19-2011
Posts: 1,553
From: N.Y.
10redss
Good luck today.
I am curious what they will find as the issue.At least you do not sound
To worried about it , me on the other hand I would be really wondering what it is.
The good point is you are under warranty. So all should be covered.
Good luck today.
I am curious what they will find as the issue.At least you do not sound
To worried about it , me on the other hand I would be really wondering what it is.
The good point is you are under warranty. So all should be covered.
Senior Member
Joined: 11-08-2009
Posts: 220
From: Los Angeles, Dallas, New York
10 Red,
I do feel for you, cause I've been there. You spend a grand and just can't wait to have that 290 hp, get your car it runs for a few days and bam, it all goes south.
Now I know someone will chime in and say they've never had a problem, pull 27lbs of boost and have driven to mars and back and maybe they have, but it is a buzz kill to expect something that could be fun and have it go unfun.
You'll get it worked out, just remember, write it all down.
IMO
I do feel for you, cause I've been there. You spend a grand and just can't wait to have that 290 hp, get your car it runs for a few days and bam, it all goes south.
Now I know someone will chime in and say they've never had a problem, pull 27lbs of boost and have driven to mars and back and maybe they have, but it is a buzz kill to expect something that could be fun and have it go unfun.
You'll get it worked out, just remember, write it all down.
IMO