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Old 02-25-2006, 06:10 PM   #1
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Default After larger injector install how to tune?

Has anyone else had problems with trying to adjust fuel trim with OBDII w/ utec.
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Old 02-25-2006, 08:16 PM   #2
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...ya gotta change the injector scaling.....'WAS' to 'IS'
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Old 02-25-2006, 10:59 PM   #3
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ok, where? Tried in the Open Loop parameters....values from 720 to 900 using the OBDII scanner.....I'll kiss someones ass to see them do this and get to +_7%.......what about this 0% column stuff? What do you do if short trim is - negative and long trim is positive. Add or remove fuel in the o % column. You get such a wide range of numbers across all rpm ranges it seems impossible to calibrate.......you answer guru tells me nothing....I like to have some damn answers....
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Old 02-25-2006, 11:08 PM   #4
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Last edited by Aerosim Research Ltd; 02-25-2006 at 11:19 PM.
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Old 02-25-2006, 11:18 PM   #5
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In the UTEC manual, you will see that in order to change settings for new injectors, you need to go to Parameter menu and go to open loop fueling. Under there you will see "Injector flow". Then just put how many CC's your injectors are.
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Old 02-26-2006, 12:44 AM   #6
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If it was that easy I would have done it...you have obvously never put aftermarket modded injectors in before on 02 wrx .....precisely my point...but you have all the answers
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Old 02-26-2006, 01:46 AM   #7
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Make sure you turn open-loop "on". Put "Stock flow" to 440 or 420, whatever. Put "Current flow" to the new size.

In the other parameters page, where it says "Global maf offset" or something like that, say "yes" with a "1".

Sorry for any vaugeness but you get the idea. It is very late and im tired.

With modded stock injectors set in the utec at 850 I get fuel trims very close to 0.

Jeff
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Old 02-26-2006, 06:39 AM   #8
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Quote:
Originally Posted by NavyBlueSubaru
Make sure you turn open-loop "on". Put "Stock flow" to 440 or 420, whatever. Put "Current flow" to the new size.

In the other parameters page, where it says "Global maf offset" or something like that, say "yes" with a "1".

Sorry for any vaugeness but you get the idea. It is very late and im tired.

With modded stock injectors set in the utec at 850 I get fuel trims very close to 0.

Jeff
You heard him Jeff, if it were that easy, he would have already done it.

Quote:
Originally Posted by +++
f it was that easy I would have done it...you have obvously never put aftermarket modded injectors in before on 02 wrx .....precisely my point...but you have all the answers
No, I have never put modded aftermarket injectors in a 02 WRX before. I have put Pink injectors in an 02 and an 05.
By the way, why would you modify aftermarket injectors?

Quote:
Originally Posted by +++
you answer guru tells me nothing....I like to have some damn answers....
Not the Best way to expect help from people.

Quote:
Originally Posted by Utec Manual
Injector flow (cc per min) allows you to scale the background open loop fuel map if you have installed larger aftermarket injectors on your car.
Thats what I did with the Pinks. It worked. Should work for you too. If not and you dont know how to tune the thing, dont bite the heads off people that try to help. Take it to a tuner before you blow your engine and complain that the UTEC sucks.

On top of that, its not like you give us much to work with. Do you have an aftermarket intake? What Mods?

Quote:
Originally Posted by StreetTuner Manual
In addition, do not attempt to tune for an aftermarket Intake and aftermarket injectors at the same time. An aftermarket intake will effect your A/F Correction and Learning values at idle, making it nearly impossible to find an accurate Injector Scale Value. It is advised you do the injector scale tuning using a stock intake if possible. If you plan to use an aftermarket intake, it can be installed and the necessary tuning performed AFTER (or BEFORE) you have found the optimal Fuel Injector Scale value but not attempt both at the same time.

Last edited by darksands; 02-26-2006 at 06:48 AM.
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Old 02-26-2006, 11:30 AM   #9
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Ok, thanks for the response guys.....open loop on set to "1" helped and some other street tuning......using modded stock with no Big maf......just got a little frustrated............
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