turbo flutter and brake-fix program issues: resolved
05-11-2010 | 03:35 PM
#1
Thread Starter
Senior Member
Joined: 03-11-2009
Posts: 327
From: WI
turbo flutter and brake-fix program issues: resolved
Issue: So, at about 20K-22K miles been hearing a bit of turbo flutter in this ideal climate for boost.....and my "Hard Brakes on cold start" issue started to come back. (previously was taken in and they programmed and put in the axillary pump some 10K miles ago)
Resolution:
Took her in to the dealer.....they reflashed her for both:
- there was a TSB on the flutter
- there was revised code for the brake issue
Results:
Runs loads better. Much crisper response, boost always there. Feels more aggressive again....(in normal mode).
Back to getting 30 or 31 mpg hwy/city avg for me.....she had slipped to 26.1 or so.
Next Step
- there appears to be a new flash for the brakes and a new part...they ordered the part, even though the issue is about 99% no longer present, to replace my current auxillary pump or can. I'll know more Wednesday when they install the new part.
Resolution:
Took her in to the dealer.....they reflashed her for both:
- there was a TSB on the flutter
- there was revised code for the brake issue
Results:
Runs loads better. Much crisper response, boost always there. Feels more aggressive again....(in normal mode).
Back to getting 30 or 31 mpg hwy/city avg for me.....she had slipped to 26.1 or so.Next Step
- there appears to be a new flash for the brakes and a new part...they ordered the part, even though the issue is about 99% no longer present, to replace my current auxillary pump or can. I'll know more Wednesday when they install the new part.
05-12-2010 | 08:29 AM
#3
Thread Starter
Senior Member
Joined: 03-11-2009
Posts: 327
From: WI
Ever wondered why or how you can make your turbo make that 'flutter' sound? It sounds great doesn't it?
The only problem is that this flutter is extremely unhealthy for your turbo. The flutter is caused when the throttle is shut and air caught betweent the free-spinning turbo and the closed throttle (when you have no vent ie blow-off valve).
The consequent back pressure forces the air back through the turbine blades. The more technical term for this is 'cavitation', which places enormous loads on the turbo and can or more than likely WILL lead to premature wear of the turbo bearings and other load-bearing components.
The simple fix is to simply fit a blow-off valve to your current setup or to make sure the blow-off valve you have selected is correctly matched to the output of the turbo and is working correctly (ie not outside its flow capacity).
So whilst it is a great sound and I absolutely love it myself, it pays to try and rid your system of that sound, unless of course you have deep pockets and don't mind forking out for new turbos prematurely.
06-27-2010 | 03:08 PM
#6
Member
Joined: 08-11-2009
Posts: 56
From: New Orleans,La
http://hhr.dejonpowerhouse.com/ will help you!!!! ten minute to forty minute change depending on what tools you have.
06-28-2010 | 08:01 PM
#9
Senior Member
Joined: 08-18-2008
Posts: 191
From: Kannapolis, North Carolina
Have you ever heard a Buick Grand National when it goes from full boost to no boost instantly, that's the "flutter".
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