high a/f correction and learning at idle - Page 3 - Subaru WRX Forum
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post #31 of 48 Old 10-01-2013, 06:17 AM
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Okay I have a question?
What mods do you currently have?

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post #32 of 48 Old 10-01-2013, 06:52 AM
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You have 2 options here. 1)disconnect the waste gate vacuum line and run waste gate pressure only, 2) pull the injectors and put in ones that are tested to be with in 1% +/- flow rate of each other. what's causing your issue is the difference in flow rates. example; one side of the motor has injectors that are 820cc the other side has 2 that are 750cc...one side is dumping more fuel thus the ECU which thinks you have 750cc thinks your car is running rich and trying to adjust....

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post #33 of 48 Old 10-01-2013, 10:24 AM
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Quote:
Originally Posted by texasmr2 View Post
I do know enough about tuning to express my opinion though.
I can agree that you know enough about tuning. Just the most supported options for this car is OS (open source) tuning and AP (Cobb AccessPort) tuning. Piggyback EMS and something more along the lines of a MoTeC are not really necessary for most people. If you're going balls to the wall all out and want more options then feel free. But, those options don't have a lot of support outside of its own niche community.

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"When in doubt...flat out" - Colin McRae
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post #34 of 48 Old 10-01-2013, 01:10 PM Thread Starter
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Quote:
Originally Posted by psinuse View Post
Okay I have a question?
What mods do you currently have?
my mods:
vf39 turbo
gm ebcs
up pipe
full 3 inch catless tbe
ebay silicone turbo inlet(stock one ripped)
stock airbox with k&n drop in
(wanted to be tuned with my short ram, but running the stock box currently)
sti pink injectors (now modded)
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post #35 of 48 Old 10-01-2013, 01:12 PM Thread Starter
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before the injectors were modded i had been running xpt tuning ots map for these mods.....

when i first started with this tuner he told me my front o2 sensor was out, wasnt getting a reading from it (wich it was out), replaced that and the car ran much better after.....then sd that i was still lean at idle and thought i may have a vac leak...searched around and found a few leaks that i fixed, but couldnt find anymore........now he's thinking my maf sensor is going bad, he says the voltage is slowly dropping. he sd that he can tune it like this, but in a few months it would probably just lean out again due to the maf sensor getting week.
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post #36 of 48 Old 10-01-2013, 01:25 PM Thread Starter
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did some research on the guy that's doing the tuning currently...found this thread

Tuning Alliance Maps and AP's - NASIOC
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post #37 of 48 Old 10-01-2013, 02:48 PM
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It could be your MAF, but I have the original in mine and it reads fine. I still say go with better injectors or at least make sure the flow rate on those is close.

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post #38 of 48 Old 10-01-2013, 03:14 PM Thread Starter
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Originally Posted by psinuse View Post
It could be your MAF, but I have the original in mine and it reads fine. I still say go with better injectors or at least make sure the flow rate on those is close.
ya, i think im gonna try the maf, i found one rather cheap....if still having problems i will get some new injectors, or at least see if mine are flowing correctly
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post #39 of 48 Old 10-01-2013, 03:15 PM Thread Starter
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how many miles do you have on yours psinuse?
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post #40 of 48 Old 10-01-2013, 05:42 PM
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115k. I am probably going to go with a bigger MAF housing soon as I believe halving the values on the table are causing me some quirky tuning issues.

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post #41 of 48 Old 10-01-2013, 05:51 PM Thread Starter
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115k. I am probably going to go with a bigger MAF housing soon as I believe halving the values on the table are causing me some quirky tuning issues.
ya i have 107k on mine....wierd..
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post #42 of 48 Old 10-01-2013, 06:43 PM
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I might add that is 115k of hard miles, well at least 110k of it was hard...lol I am very OCD about care for my cars, so cleaning the MAF sensor is a common for people like me...

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post #43 of 48 Old 10-01-2013, 08:59 PM Thread Starter
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ya, i have kinda slacked on the cleaning of the maf.......maybe thats why its going bad?
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post #44 of 48 Old 10-01-2013, 09:47 PM
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Try cleaning it and see if that helps...
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post #45 of 48 Old 10-08-2013, 12:11 AM Thread Starter
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Update.......replaced the maf and correction got much better.......hopefully the rest of the tune goes smoothly....

Thanx again guys

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