sti 2007 rough start/ hesitation

kev20 · 10-06-2012, 11:52 AM

Hi!

I search to find my problem but not find

The problem begin after i got tuned
Im not sure but im think its a scaling issue

modification
cobb sf intake
turboback
header
injector 650cc dw
fuel pump dw
ecutek

The car start fine at cold but when i come to start when the car is hot, the car shake a lot and run really rich 11:1-11.5:1 afr
If i give a little gaz . the car come back to normal 14:5:1afr

The car have alose a little hesitation between 2000-3000rpm BUt not Always
And i can read lean on this spot (15-16:1afr)

But at wot, the car have not hesitation

its like a bad o2 sensor, but i change it 800mile ago

please if you can help me...

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APM Tuned · 10-06-2012, 01:44 PM

go back and talk to your tuner, this isn't a simple fix for a board...more a touch, feel and see type of thing.

-Mark

kev20 · 10-06-2012, 02:17 PM

Yes i know, The tuner is has more than 7 hours of road, that why i wanna know if its really in the tune

tekfoc · 10-06-2012, 03:54 PM

its ether the tune or bad dw injectors .

kev20 · 10-06-2012, 05:35 PM

Quote:

Originally Posted by tekfoc

its ether the tune or bad dw injectors .

There is someone who had some trouble with deatchswerks injectors?

tekfoc · 10-06-2012, 06:47 PM

Quote:

Originally Posted by kev20

There is someone who had some trouble with deatchswerks injectors?

You have to remember that dw are just modified stock used injectors.
Yes their are people out there who has had problems with dw's .
This is my choice I suggest new injectors like ID OR PE INJECTORS .
Bring it back to your tuner let him look over the map .
He should easly be able to see if its his mistake or possible bad injectors .

kev20 · 10-06-2012, 07:43 PM

Quote:

Originally Posted by tekfoc

You have to remember that dw are just modified stock used injectors.
Yes their are people out there who has had problems with dw's .
This is my choice I suggest new injectors like ID OR PE INJECTORS .
Bring it back to your tuner let him look over the map .
He should easly be able to see if its his mistake or possible bad injectors .

good to know thx, but If the injectors is bad, i dont know why the car start well on cold start

tekfoc · 10-06-2012, 09:28 PM

[quote=kev20;38212658]good to know thx, but If the injectors is bad, i dont know why the car start well on cold start[/quote
Don't want to speculate .
Let the tuner look at the tables and scalings.

A good tuner is your friend.

Good luck

10-06-2012, 11:52 AM	#1
kev20 Scooby Newbie Member#: 314303 Join Date: Mar 2012	sti 2007 rough start/ hesitation Hi! I search to find my problem but not find The problem begin after i got tuned Im not sure but im think its a scaling issue modification cobb sf intake turboback header injector 650cc dw fuel pump dw ecutek The car start fine at cold but when i come to start when the car is hot, the car shake a lot and run really rich 11:1-11.5:1 afr If i give a little gaz . the car come back to normal 14:5:1afr The car have alose a little hesitation between 2000-3000rpm BUt not Always And i can read lean on this spot (15-16:1afr) But at wot, the car have not hesitation its like a bad o2 sensor, but i change it 800mile ago please if you can help me... * Registered users of the site do not see these ads.

10-06-2012, 09:28 PM	#8
tekfoc Scooby Specialist Member#: 21392 Join Date: Jul 2002 Chapter/Region: Tri-State Location: NEW YORK CITY Vehicle: 2007 IMPREZA WRX STI urban gray	[quote=kev20;38212658]good to know thx, but If the injectors is bad, i dont know why the car start well on cold start[/quote Don't want to speculate . Let the tuner look at the tables and scalings. A good tuner is your friend. Good luck Last edited by tekfoc; 10-06-2012 at 09:33 PM.

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10-06-2012, 01:44 PM	#2
APM Tuned NASIOC Vendor Member#: 282460 Join Date: May 2011 Chapter/Region: MWSOC Location: Elmhurst, IL Vehicle: 2005 Evo-STI R.R.-WRB	go back and talk to your tuner, this isn't a simple fix for a board...more a touch, feel and see type of thing. -Mark

10-06-2012, 02:17 PM	#3
kev20 Scooby Newbie Member#: 314303 Join Date: Mar 2012	Yes i know, The tuner is has more than 7 hours of road, that why i wanna know if its really in the tune

10-06-2012, 03:54 PM	#4
tekfoc Scooby Specialist Member#: 21392 Join Date: Jul 2002 Chapter/Region: Tri-State Location: NEW YORK CITY Vehicle: 2007 IMPREZA WRX STI urban gray	its ether the tune or bad dw injectors .