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Old 02-09-2013, 10:18 PM   #1
pmellick85
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Member#: 319418
Join Date: May 2012
Location: louisville ky
Vehicle:
2005 sti
wrb

Default ffs 9 psi???

Tried doing some searching with no luck. When I have ffs enabled I reach target boost initially but after I shift my boost wont go above 9 psi. If I disable ffs and shift normally it reach target boost after every shift. Any ideas? It is an 05 sti with short ram intake and cobb stage 1 93 map.
I did one pull a few mins ago and got a reading of 16.7 psi. Seems like I overboosted for whatever reason. Isnt target boost on stage 1 14.5 psi? Any help you guys could give would be great thanks.
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Old 02-11-2013, 09:23 AM   #2
Cobb Tuning
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Location: Austin, DFW, Portland, SOCAL
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Quote:
Originally Posted by pmellick85 View Post
Tried doing some searching with no luck. When I have ffs enabled I reach target boost initially but after I shift my boost wont go above 9 psi. If I disable ffs and shift normally it reach target boost after every shift. Any ideas? It is an 05 sti with short ram intake and cobb stage 1 93 map.
I did one pull a few mins ago and got a reading of 16.7 psi. Seems like I overboosted for whatever reason. Isnt target boost on stage 1 14.5 psi? Any help you guys could give would be great thanks.
Hi there. What intake do you have? Keep in mind that only the Cobb SF and stock intake are compatible with these maps. Using other intakes, although not the cause of any boost issue, can potentially cause load errors with the potential for engine damage. You can get a custom tune for other intakes, however, through a protuner that tunes for the Accessport.

Best to get a data log (assuming the correct intake is being run as described above) of the boost issue as well as a general 4th (or 3rd) gear run (as described in the video below), if you can do so safely.


Bill
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Old 02-11-2013, 02:04 PM   #3
jebjkey
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Join Date: Nov 2004
Chapter/Region: International
Location: Naples, ITALY
Vehicle:
2005 STi
2006 Evolution MR

Default

I had the same problem with LC/FFS.
Look at these tables under Boost Limiters:
Boost Control Disable (Fuel Cut Active)(Min. Boost)
Boost Control Disable (Fuel Cut Active)(Min. Load)
Boost Control Disable (Fuel Cut Active)(Min. RPM)

and this one under Miscellaneous Limiters:
Rev Limit (Fuel Cut) Primary Fuel Resume (Max Boost)

Raise the values so that they are higher than what you see during LC and/or FFS situations. For example:
min boost=20#
min load=3.5
min RPM=7000
max boost=20#
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Old 02-11-2013, 02:47 PM   #4
Cobb Tuning
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Originally Posted by jebjkey View Post
I had the same problem with LC/FFS.
Look at these tables under Boost Limiters:
Boost Control Disable (Fuel Cut Active)(Min. Boost)
Boost Control Disable (Fuel Cut Active)(Min. Load)
Boost Control Disable (Fuel Cut Active)(Min. RPM)

and this one under Miscellaneous Limiters:
Rev Limit (Fuel Cut) Primary Fuel Resume (Max Boost)

Raise the values so that they are higher than what you see during LC and/or FFS situations. For example:
min boost=20#
min load=3.5
min RPM=7000
max boost=20#
The tables that jebkey lists are most likely the problem here. On these earlier Subaru ECUs, the boost threshold for boost disable with fuel cut in the OEM calibration is very low causing this to be more of a problem with FFS than later ECUs. But, I would get a data log first anyway just to make sure everything looks good and that there isn't any other problems before trying to restore full boost by manipulating these tables. You also want to verify the intake you are running before making any changes.

Bill
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Old 02-11-2013, 02:53 PM   #5
pmellick85
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Join Date: May 2012
Location: louisville ky
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2005 sti
wrb

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Cool thanks for all the info. I will pull a data log and adjust the tables if needed. And im running the cobb sf intake.
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