Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Engine Management & Tuning > Open Source Reflashes

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 04-06-2010, 01:42 AM   #1
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default First learning view and IAM is 5?

Car is an 03 WRX. Stock tune. Any ideas why the IAM is so low or what to look for next?

* Registered users of the site do not see these ads.
Rally Monkey is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-06-2010, 10:09 AM   #2
izadoo
Scooby Newbie
 
Member#: 181467
Join Date: Jun 2008
Chapter/Region: MWSOC
Location: hockeytown
Vehicle:
2004 wrx sti
wrb

Default

stock tune, stock car?
did you just reset the computer? that would bring it down if you took the reading after 5 minutes of driving.

(more info needed)
izadoo is offline   Reply With Quote
Old 04-06-2010, 10:55 AM   #3
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

I changed my spark plugs over the weekend, so yes the computer has been reset.
The learning veiw I did beore this one showed an IAM of 10, then the next day it was at 5.
Car is stock, tune is stock. I live in the Phoenix,AZ area so the air temp is about 75 now. The reason I started data logging now is to try and solve a problem I have been experiencing for the past 3 summers. When the outside air temp gets over say 90 the car only allows waste gate boost presure, 7 pounds consistantly. I can reset the computer and it will go back to stock boost level for 15 minutes and then pull boost again.
When the air temp cools down the car is normal all winter.
Rally Monkey is offline   Reply With Quote
Old 04-06-2010, 11:14 AM   #4
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

Also I think I am hearing detonation at WOT in the 3500-4500 rpm range. Sounds like a rattle.
I have data logs in Exel but it did'nt copy and paste well.

Last edited by Rally Monkey; 04-06-2010 at 11:24 AM.
Rally Monkey is offline   Reply With Quote
Old 04-06-2010, 11:20 AM   #5
MAtwal
Scooby Newbie
 
Member#: 125053
Join Date: Sep 2006
Chapter/Region: VIC
Location: Vancouver, BC
Vehicle:
2004 Wrx Sedan
WRB

Default

What's your plugs gapped at?
MAtwal is offline   Reply With Quote
Old 04-06-2010, 11:27 AM   #6
quazimoto
Scooby Guru
 
Member#: 70395
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Da-boonies,Va
Default

What octane are you using? Posting the log like that makes my head hurt http://forums.nasioc.com/forums/show....php?t=1015846
Maybe bad/dirty MAF or IAT. Check for oil build up in intercooler. How is the coolant temp? Have you ever tried a topend/combustion chamber cleaning?
quazimoto is offline   Reply With Quote
Old 04-06-2010, 11:32 AM   #7
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

91 pump gas. Shell brand.
Rally Monkey is offline   Reply With Quote
Old 04-06-2010, 11:35 AM   #8
elevenpoint7five
Scooby Specialist
 
Member#: 187798
Join Date: Aug 2008
Chapter/Region: MWSOC
Location: Elgin, IL
Default

Quote:
Originally Posted by MAtwal View Post
What's your plugs gapped at?
This could be an issue

Quote:
Originally Posted by quazimoto View Post
What octane are you using? Posting the log like that makes my head hurt http://forums.nasioc.com/forums/show....php?t=1015846
Maybe bad/dirty MAF or IAT. Check for oil build up in intercooler. How is the coolant temp? Have you ever tried a topend/combustion chamber cleaning?
AZ gas is piss poor, similar to Cali.

OP: I recommend checking the plugs first, then if they are at or damn close to .028, I would think about having someone give you a "stage 1" tune to accommodate for the piss poor gas. If you wanted to see if this will help, run the tank down lose to empty, put a few gallons of race gas in, and reset the ecu. I'll bet that the IAM stays at 16 and your car gets good boost all the time.

Andy
elevenpoint7five is offline   Reply With Quote
Old 04-06-2010, 01:26 PM   #9
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

Quote:
Originally Posted by MAtwal View Post
What's your plugs gapped at?
Plugs gapped at .028
Rally Monkey is offline   Reply With Quote
Old 04-06-2010, 03:30 PM   #10
ProdriveDreams
Scooby Specialist
 
Member#: 146819
Join Date: Apr 2007
Chapter/Region: NESIC
Location: Boston / Ipswich, MA
Vehicle:
'02 WRB VF-39'd WRX
W/06 STi Drivetrain swap

Default

the reason you're running wastegate boost when it's hot is because of the low IAM i would bet.
ProdriveDreams is offline   Reply With Quote
Old 04-06-2010, 03:34 PM   #11
quazimoto
Scooby Guru
 
Member#: 70395
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Da-boonies,Va
Default

Quote:
Originally Posted by ProdriveDreams View Post
the reason you're running wastegate boost when it's hot is because of the low IAM i would bet.
I think thats a given......... We are looking at more of why the IAM is low,especially when its hot.
quazimoto is offline   Reply With Quote
Old 04-06-2010, 06:27 PM   #12
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

Other things I have tried was to change the MAF and front 02 sensor. I used sea foam at one point. I just found a gas station down the street from me that sells 100 octane race gas, I will try that. I saw at home Depot that theysell camera scopes. I would love to get one of those to inspect the inside of the combustion chamber maybe that would reveal carbon build up.
Rally Monkey is offline   Reply With Quote
Old 04-06-2010, 07:48 PM   #13
ProdriveDreams
Scooby Specialist
 
Member#: 146819
Join Date: Apr 2007
Chapter/Region: NESIC
Location: Boston / Ipswich, MA
Vehicle:
'02 WRB VF-39'd WRX
W/06 STi Drivetrain swap

Default

Quote:
Originally Posted by quazimoto View Post
I think thats a given......... We are looking at more of why the IAM is low,especially when its hot.

I was just stating it for the OP cause I wasn't sure through the posts if he was clear on that was why his car was behaving that way.

Quote:
Originally Posted by Rally Monkey View Post
I saw at home Depot that theysell camera scopes. I would love to get one of those to inspect the inside of the combustion chamber maybe that would reveal carbon build up.
really?!? how much? why would they have these at home depot? mold inspections in walls?? I really can't think of any good reason.
ProdriveDreams is offline   Reply With Quote
Old 04-07-2010, 12:13 AM   #14
NSFW
Scooby Guru
 
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
Vehicle:
05 Stage Free LGT
ATP 3076, 6MT, AVO FMIC

Default

Quote:
Originally Posted by Rally Monkey View Post
Other things I have tried was to change the MAF and front 02 sensor. I used sea foam at one point. I just found a gas station down the street from me that sells 100 octane race gas, I will try that. I saw at home Depot that theysell camera scopes. I would love to get one of those to inspect the inside of the combustion chamber maybe that would reveal carbon build up.
I am very curious if 100oct makes a difference. Almost every 02 WRX learning view I've seen has showed knock corrections all over the place, and/or a reduced IAM. It makes me wonder if the knock sensor is just noisy, or if the stock timing is ridiculous.

So far I lean very heavily toward the "stock timing is ridiculous" theory as I have seen improvements from reducing timing, but if the problem goes away with 100oct that would settle the question IMO.
NSFW is offline   Reply With Quote
Old 04-07-2010, 12:24 AM   #15
project_skyline
Scooby Specialist
 
Member#: 153880
Join Date: Jul 2007
Chapter/Region: RMIC
Location: Western Slope, Colorado
Vehicle:
03 Evo VIII
2011 STI

Default

Any mods or just stock tune on stock car?
project_skyline is offline   Reply With Quote
Old 04-07-2010, 01:45 AM   #16
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

Quote:
Originally Posted by NSFW View Post
I am very curious if 100oct makes a difference. Almost every 02 WRX learning view I've seen has showed knock corrections all over the place, and/or a reduced IAM. It makes me wonder if the knock sensor is just noisy, or if the stock timing is ridiculous.

So far I lean very heavily toward the "stock timing is ridiculous" theory as I have seen improvements from reducing timing, but if the problem goes away with 100oct that would settle the question IMO.
Good input. I just filled the tank or I would have tried the 100 oct today. Should be about a week till I burn the tank down. If I was getting audible detonation (that I can hear in the car) would that be apparent in learing veiw? I do hear a rattle some times in WOT, 2nd and 3rd gear, around 3000-4000 Rpm.
Rally Monkey is offline   Reply With Quote
Old 04-07-2010, 01:47 AM   #17
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

Quote:
Originally Posted by project_skyline View Post
Any mods or just stock tune on stock car?
Stock tune, stock car. I do have a Perrin LCP.
Rally Monkey is offline   Reply With Quote
Old 04-07-2010, 01:47 AM   #18
NSFW
Scooby Guru
 
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
Vehicle:
05 Stage Free LGT
ATP 3076, 6MT, AVO FMIC

Default

I don't know the answer to that, sorry.
NSFW is offline   Reply With Quote
Old 04-07-2010, 02:00 AM   #19
MAtwal
Scooby Newbie
 
Member#: 125053
Join Date: Sep 2006
Chapter/Region: VIC
Location: Vancouver, BC
Vehicle:
2004 Wrx Sedan
WRB

Default

You won't see detonation in WOT on your lv. From what I remember in an old post of mine someone said if in open loop and the knock sensor picks something up, it decreases your IAM.

I had a tuning issue where I heard "rattling" at wot and thought it was heat shield making IAM drop but once heat shield removed, still had rattle on wot pulls.

can someone confirm. If in OL there's knock then IAM is affected and in CL it's flkc fbkc. Or does it depend on severity of knock
MAtwal is offline   Reply With Quote
Old 04-07-2010, 02:23 AM   #20
elevenpoint7five
Scooby Specialist
 
Member#: 187798
Join Date: Aug 2008
Chapter/Region: MWSOC
Location: Elgin, IL
Default

It depends on about 10 different things. Basically only one sort of knock control can be active at once; FBKC, FLKC, or IAM. http://www.romraider.com/forum/viewtopic.php?t=1840

Andy
elevenpoint7five is offline   Reply With Quote
Old 04-07-2010, 02:30 AM   #21
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

Code:
	load	rpm	KCA	Toa	Fbkc	Flkc	IAM	Kca iam
0	1.31	2918	2.5	56.47	0	0	5	2.81
156	1.4	2988	2.5	58.82	0	0	5	2.81
312	1.41	3014	2.5	69.8	0	0	5	2.81
468	1.44	3012	2.5	87.45	0	0	5	2.81
624	1.47	3094	2.5	92.94	0	0	5	2.81
780	1.5	3138	2.5	93.33	0	0	5	2.81
936	1.57	3159	2.5	100	0	0	5	2.81
1092	1.62	3255	2.5	100	0	0	5	2.81
1248	1.67	3289	2.5	100	0	0	5	2.81
1404	1.74	3356	2.5	100	0	0	5	2.81
1545	1.78	3400	3	100	0	0.35	5	2.81
1716	1.77	3421	3	100	0	0.35	5	2.81
1857	1.77	3526	3	100	0	0.35	5	2.81
2013	1.78	3570	3	100	0	0.35	5	2.81
2169	1.79	3620	3	100	0	0.35	5	2.81
2325	1.81	3669	3	100	0	0.35	5	2.81
2481	1.84	3698	2.5	100	0	0.35	5	2.46
2637	1.84	3786	2.5	100	0	0.35	5	2.46
2793	1.88	3822	2.5	100	0	0.35	5	2.46
2949	1.83	3868	2.5	100	0	0.35	5	2.46
3105	1.83	3920	2.5	100	0	0.35	5	2.46
3261	1.8	3970	2.5	98.82	0	0.35	5	2.46
Does this log look like I am getting a lot o knock, mild knock, normal?

Last edited by Rally Monkey; 04-07-2010 at 12:56 PM. Reason: tried to Fixed log posting
Rally Monkey is offline   Reply With Quote
Old 04-08-2010, 12:05 AM   #22
NSFW
Scooby Guru
 
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
Vehicle:
05 Stage Free LGT
ATP 3076, 6MT, AVO FMIC

Default

FBKC never increases
FLKC increases, but it goes up by 0.35. It's only interesting if it goes up by 1.4.
IAM never decreases.
Therefore, you did not knock during that log.

But, since IAM is only 5, you aren't running at full ignition advance, so the lack of knock doesn't really tell you anything. Your car had a knock problem in the not-too-distant past, and the ECU reduced IAM in hopes that it would prevent knock, and that worked.

If you want to know where you were knocking, you'll have to reset the ECU and log another pull.

Before the pull, check your IAM - if it's not 16, then your ECU hasn't yet raised IAM, or you've already had knock. If that is the case, it would probably be helpful to reset the ECU again, and keep the laptop in the passenger seat with IAM shown prominently, and glance at it periodically, to see if it ever goes up, or down, and under what circumstances. But do remember to look where you're going. Keep the logger going, and let that be your primary source of information. Just glance at the laptop periodically to get a rough idea of what's going on.
NSFW is offline   Reply With Quote
Old 04-08-2010, 01:14 AM   #23
Rally Monkey
Scooby Newbie
 
Member#: 36310
Join Date: May 2003
Chapter/Region: SWIC
Location: Scottsdale, AZ
Vehicle:
03 WRX Sedan
Silver

Default

NSFW...Thanks!
Rally Monkey is offline   Reply With Quote
Old 04-08-2010, 01:17 AM   #24
project_skyline
Scooby Specialist
 
Member#: 153880
Join Date: Jul 2007
Chapter/Region: RMIC
Location: Western Slope, Colorado
Vehicle:
03 Evo VIII
2011 STI

Default

Do a full pull 3-6 or 6.5k rpm's. Log RPM, load, TPS, IAM, coolant temp, KCA, ignition total timing, WB02(if you can).

Try resetting the ECU by disconnecting the batter for a bit rather then using learning view to do it.
project_skyline is offline   Reply With Quote
Old 04-08-2010, 03:15 AM   #25
NSFW
Scooby Guru
 
Member#: 140444
Join Date: Feb 2007
Chapter/Region: NWIC
Location: Near Seattle, WA
Vehicle:
05 Stage Free LGT
ATP 3076, 6MT, AVO FMIC

Default

How do you plan to figure out where the knock is, based on those parameters? I'd always log "Knock Sum" if possible, or FLKC, FBKC, and IAM (all three) if Knock Sum isn't supported.

Or set up the timing tables so you run a fixed amount of dynamic advance in the whole table (e.g. fill it with 8.0 or something). But I'm not sure that's better than logging the three knock parameters.
NSFW is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Learning view screen shot... how is it? Ryan314 Open Source Reflashes 13 06-06-2010 01:01 PM
First Learning View Screenshot...please advise hoosierdude Open Source Reflashes 16 05-16-2010 12:20 AM
First Learning View quickstart Open Source Reflashes 14 04-07-2010 12:11 AM
learning view and uego fuji_production Open Source Reflashes 11 01-27-2010 03:07 PM
Rumors: 3.6l NA w/ 300bhp and Impreza is 5, etc... NYCshopper News & Rumors 44 07-25-2003 11:35 PM

All times are GMT -4. The time now is 11:24 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.