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1st night with 92x and probs
Posted: Thu Feb 28, 2008 10:02 pm
by goob_os101
Just got home from the dealer with my 05 92x aero w 52k
Well I noticed something fishy. When I hit 3,700-4,000 rpm in 3rd and 4th the boost/power starts to flux. The boost starts to build and I start to feel a constant gain, then it starts to hesitate/stutter.
Is it normal or could it be a boost leak?
Oh Noes
Posted: Thu Feb 28, 2008 11:16 pm
by zaxrex
Well, one thing to think about is that it is fairly cold today. If you got this car from a dealer, odds are it wasn't running much in the cold weather or/and they took the terminals off of the battery.
It may be that your ECU needs to adjust itself for the dense air. Your boost builds quicker as you go up in gears due to higher load. It could just be that the car is learning the maps in that higher load area.
Stumbling would not be a direct cause of a boost leak, usually sometihing with timing, or funky wastegate action...
Just some thoughts.
You should run it with some logging of the engine parameters so we can help you document what is going on.
Posted: Fri Feb 29, 2008 9:48 am
by Sabre
My first thought was wastegate fluttering. Zak makes a good point about cold air + reset ECU though!
Re: 1st night with 92x and probs
Posted: Sun Mar 02, 2008 8:24 pm
by Phibs
goob_os101 wrote:Just got home from the dealer with my 05 92x aero w 52k
Well I noticed something fishy. When I hit 3,700-4,000 rpm in 3rd and 4th the boost/power starts to flux. The boost starts to build and I start to feel a constant gain, then it starts to hesitate/stutter.
Is it normal or could it be a boost leak?
Oh Noes
The only way to figure out what's going on would be some data logging but a boost issue @ that RPM does sound fishy...
Posted: Sun Mar 02, 2008 10:07 pm
by zaxrex
It doesn't sound like he is sure it is a boost issue since he has no boost gauge. Just sees power loss. But logging would be the best thing.