Only boosting at 11 PSI with ECUtek tune

na-STi · 02-09-2008, 10:27 PM

This has happened to me twice already where my car would all of a sudden only boost at 11 PSI. When I reset the ECU it goes back to normal.
I have a Helix catted DP with custom ECUtek tune. Does anyone know what might cause this? My tuner has been MIA for over a year so I can't ask him.
It happened today at my track event. When I reset the ECU between sessions it would boost at 16 PSI. This is better than 11 PSI but still lower than the 18.5 I would normally get.

ItalianStallion · 02-10-2008, 04:10 PM

you might want to check your vacumm lines. sounds like a leak

CenCali07STI · 02-10-2008, 07:13 PM

Sounds like stock wastegate spring boost. check all your vacuum line connections in the boost soleniod area and coming off the turbo anywhere else they run too. you might even have a crack in one of them if they are not disconnected.

MasterColin · 02-10-2008, 09:06 PM

If it is a leak would it change as he resets? I would think it would stay down.

na-STi · 02-10-2008, 11:03 PM

Quote:

Originally Posted by MasterColin

If it is a leak would it change as he resets? I would think it would stay down.

That's what I was thinking. It happens when I stay in third gear near redline for a few seconds. Such as going through a series of medium speed turns on a road course all in third gear. But it seems to be totally random since it has only happened me twice, once at the track and once on the street. Is the ECU sensing something bad and cutting boost?

***jnprn2003*** · 02-10-2008, 11:36 PM

Vacc leak...it happened to me an I ran on WG boost for the ride until I got it fixed.

na-STi · 02-11-2008, 12:51 PM

Quote:

Originally Posted by jnprn2003

Vacc leak...it happened to me an I ran on WG boost for the ride until I got it fixed.

Does anyone have a diagram of all the hoses I should check or a link to another thread that has a diagram? Do I need to buy better hoses?

02-09-2008, 10:27 PM	#1
na-STi Professional STI Driver Posts: 497 Join Date: Apr 2004 Trader Rating: (0)	Only boosting at 11 PSI with ECUtek tune This has happened to me twice already where my car would all of a sudden only boost at 11 PSI. When I reset the ECU it goes back to normal. I have a Helix catted DP with custom ECUtek tune. Does anyone know what might cause this? My tuner has been MIA for over a year so I can't ask him. It happened today at my track event. When I reset the ECU between sessions it would boost at 16 PSI. This is better than 11 PSI but still lower than the 18.5 I would normally get. This ad is not endorsed by this member. Please register or login to hide this ad.

02-10-2008, 04:10 PM	#2
ItalianStallion Junior STI Driver Car: 07 SWP STI Fav Mod: Tim Bailey Protune Location: Seattle Posts: 126 Join Date: Mar 2007 Trader Rating: (5)	Re: Only boosting at 11 PSI with ECUtek tune you might want to check your vacumm lines. sounds like a leak

02-10-2008, 07:13 PM	#3
CenCali07STI Professional STI Racer Car: 07 STI SWP Fav Mod: Custom built TBE FTW!!! Location: Modesto, California Posts: 822 Join Date: Feb 2007 Trader Rating: (1)	Re: Only boosting at 11 PSI with ECUtek tune Sounds like stock wastegate spring boost. check all your vacuum line connections in the boost soleniod area and coming off the turbo anywhere else they run too. you might even have a crack in one of them if they are not disconnected.

02-10-2008, 09:06 PM	#4
MasterColin STI Driver Car: 06 Subaru WRX STI Fav Mod: Headlight Adjustment Location: NC/Wi Posts: 264 Join Date: Aug 2007 Trader Rating: (1)	Re: Only boosting at 11 PSI with ECUtek tune If it is a leak would it change as he resets? I would think it would stay down.

02-10-2008, 11:36 PM	#6
*jnprn2003* The Stig II Car: 07 STi, 07 Speed 3.. Fav Mod: EFI Logics tune Location: The Ocean State Posts: 1,825 Join Date: Feb 2007 Trader Rating: (8)	Re: Only boosting at 11 PSI with ECUtek tune Vacc leak...it happened to me an I ran on WG boost for the ride until I got it fixed.