Low Boost
 

So my 09 is at the dealer for the recall also asked them to look into a low boost issue only 10 pounds at wot and after the car sits for a while very low brake pressure they called to say they can't find any problems, so frustrating

More to this story ?
Like. Did the dealer say 10 lbs boost was OK ? If so, I would find another dealer who could at least do a leak test on the turbo.

Thanks firemangeorge Yes they feel since there is no code turbo must be fine, but they are checking into what normal boost should be and will test the brakes Monday morning after the car has sat awhile, its been their all week for the recall,struts, and a lock actuator I guess they are waiting on the door lock actuator to arrive on Monday

Yes you have an issue as 10 PSI is not the norm. Just because there is no code does not mean there is no issue. A good dealer would know that. :thumb:

I agree :twothumbs:

Hey there mrchevy,

Please let us know if you would like for us to reach out to your dealership on your behalf regarding your additional concern. Also, if you have any other questions or concerns we are only a private message away. Please reference this thread in the message if any extra help is needed.

Kristen A.
Chevrolet Customer Care

:twothumbs::twothumbs: And this is why I drive Chevrolets.

Thank you Kristen message sent

The official answer from Gary Lang Chevrolet about my low boost is that the cars getting 15-18 pounds of boost were calibrated that way from the factory and my car was not that just sounds like a load of BS so I guess I need to take is somewhere and have a leak test done

While it does seem low.

I'm curious as to what kind of HP/TQ numbers are you seeing. Does yours have the RPD?

15-18 lbs would be normal for a stock SS.

Not really sure what you mean in this sentence :
" is that the cars getting 15-18 pounds of boost were calibrated that way from the factory and my car was not"

So, are you getting the normal 15-18 and your gauge was only showing 10 ?
Or are you saying the dealer said your car is calibrated to only 10 lbs.
If it is so called "calibrated too low" then a simple GM reflash of the computer would do the trick.
Fwiw. I don't think there is a GM flash or reflash with a setting of 10 lbs.

You may want to rewrite your post to make it more clear.

I do have the RPD but to be honest I have never looked at either but I will now as soon as I pick the car up

I'm just curious as to what kind of HP/TQ numbers your getting.

Before the tune mine struggled to hit 15psi. 10-12psi was my norm but I was hitting my HP close enough to not warrant any issue.

After the tune I'm getting 15-17 Normally while others are getting upwards of 20

will sorry to say its still at the dealership but I will check HP/TQ as soon as I get it back their waiting on a brake control module for the brake issue I was having took them a while to diagnose that

Hey Mrchevy, Did you ever get a resolution on your issue? Would be interesting to hear the results

I'm curious also.
I've never looked at the boost at full throttle to see what it was, wanting to keep my eye's on the road. I have seen 10lb at about 3/4 throttle on a flat road.
It's been said you can use the RPD to see HP/TQ. Can I get some insight on this?

Here you go Cat Man. HP is on the analog dial gauge. Torque reads on the digital readout.

Attachment 16795

Thanks going to have to look at that. My scanner can take a snap shot while I'm driving to see the numbers instead of trying to look at the RPD.
I have an AutoXray AX7000 Scanner which gives me real values while the engine is running. I have taken a few when programming the ECM in my 83 TPI Monte Carlo. I don't burn chips with this ECM, I go in with a laptop and can change parameters.