Welcome to the North American Subaru Impreza Owners Club Saturday October 1, 2016
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo)

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.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 01-15-2006, 01:11 AM   #1
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: San Marcos, CA
Vehicle:
2016 WRX 6mt CWP

Default Bad Detonation Still- Is my engine on its way out?

I have audible detonation in my 02...I only have an axleback.

I get it above 5000RPMS at >8PSI. Its been happening for a long time now, but the dealer says "THe ECU hasn't logged any missfires so everything is fine" Its been getting somewhat worse. My boost has been cut 3 different times to 8PSI. But it comes back if I add an octane booster or drive like a grandma for a while.

My friends can hear the ting ting ting if I drive down the street on boost.

Is this a sign my engine is on its way out? Is there a way to tell if its an ECU issue or an internal engine issue?

It happens when the car goes from CL to OL. I can feel it kick in...and wham detonation.

Any ideas?

I dont want to fork over 750 bucks for an ECUtek tune and find out its an internal engine issue.

-Jeff
* Registered users of the site do not see these ads.
JeffrWRX is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 01-15-2006, 11:32 AM   #2
jigga
Scooby Guru
 
Member#: 9960
Join Date: Sep 2001
Location: in bed...
Vehicle:
2002 Impreza WRX
WRBlue Perl

Default

I think it is an EM issue to be honest with you.... do you have an ebc or mbc on the car?
jigga is offline   Reply With Quote
Old 01-15-2006, 11:39 AM   #3
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

where do you live and what kind of gas do you use? How long has your car been detonating? You can bring it in for a compression and leakdown test, and if it checks out ok, then proceed with getting a professional tune to elminiate the det issue.
hondaeater69 is offline   Reply With Quote
Old 01-15-2006, 12:03 PM   #4
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: San Marcos, CA
Vehicle:
2016 WRX 6mt CWP

Default

detonation for 20000miles...

CALI 91 Octane

ALL stock except Blitz AxleBack.

-Jeff
JeffrWRX is offline   Reply With Quote
Old 01-15-2006, 12:07 PM   #5
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

cali gas, somehow i'm not surpirsed. this is a fairly common issue with stock ecu's on cali's gas. Have you noticed a decrease in power? I would do as i have suggested above.
hondaeater69 is offline   Reply With Quote
Old 01-15-2006, 12:08 PM   #6
Davenow
Scooby Guru
 
Member#: 23676
Join Date: Aug 2002
Chapter/Region: NESIC
Location: de_dust and Orgrimar
Vehicle:
.

Default

compression test and check the condition of the plugs
Davenow is offline   Reply With Quote
Old 01-15-2006, 12:09 PM   #7
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default

Quote:
Originally Posted by 25rs92029
I have audible detonation in my 02...I only have an axleback.

I get it above 5000RPMS at >8PSI. Its been happening for a long time now, but the dealer says "THe ECU hasn't logged any missfires so everything is fine" Its been getting somewhat worse. My boost has been cut 3 different times to 8PSI. But it comes back if I add an octane booster or drive like a grandma for a while.

My friends can hear the ting ting ting if I drive down the street on boost.

Is this a sign my engine is on its way out? Is there a way to tell if its an ECU issue or an internal engine issue?

It happens when the car goes from CL to OL. I can feel it kick in...and wham detonation.

Any ideas?

I dont want to fork over 750 bucks for an ECUtek tune and find out its an internal engine issue.

-Jeff
Your first step should be to reproduce the problem for a Subaru tech. This might involve hooking up an electronic "ear" (i.e. microphone) in the engine bay so that the tech can listen in with earphone while you drive.

Assuming you can get the tech to agree that your engine is knocking, you would then suggest that the tech check Subarunet to see whether there is any ECM reprogramming available from SOA that fixes such a problem. He should find a fix for the 2002 WRX that corrects a problem described as "Pinging at high rpm (6000)." He should then check you ECM's Calibration ID with his Subaru Select Monitor to determine whether your ECM has that fix installed. If your ECM's CalID is less than A4SGD10C, then the pinging fix is not installed on your ECM and the tech should then print and fill out a form found on Subarunet called "ECM/TCM reprogramming fax form" and fax it to SOA. SOA will respond to the tech with ECM shipping authorization and instructions. Your car will be down for a few days.

Last edited by Jon [in CT]; 01-15-2006 at 12:15 PM.
Jon [in CT] is offline   Reply With Quote
Old 01-15-2006, 12:17 PM   #8
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

Quote:
Originally Posted by Jon [in CT]
Your first step should be to reproduce the problem for a Subaru tech. This might involve hooking up an electronic "ear" (i.e. microphone) in the engine bay so that the tech can listen in with earphone while you drive.

Assuming you can get the tech to agree that your engine is knocking, you would then suggest that the tech check Subarunet to see whether there is any ECM reprogramming available from SOA that fixes such a problem. He should find a fix for the 2002 WRX that corrects a problem described as "Pinging at high rpm (6000)." He should then check you ECM's Calibration ID with his Subaru Select Monitor to determine whether your ECM has that fix installed. If your ECM's CalID is less than A4SGD10C, then the pinging fix is not installed on your ECM and the tech should then print and fill out a form found on Subarunet called "ECM/TCM reprogramming fax form" and fax it to SOA. SOA will respond to the tech with ECM shipping authorization and instructions. Your car will be down for a few days.

wasn't this fix attempted in the stickied thread at the top of the forum (detonation casues found!) with no benefit?
hondaeater69 is offline   Reply With Quote
Old 01-15-2006, 12:23 PM   #9
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default

Quote:
Originally Posted by hondaeater69
wasn't this fix attempted in the stickied thread at the top of the forum (detonation casues found!) with no benefit?
The sticky'd thread deals with problems found only on 2004/5 WRXes, not a 2002 WRX. There is a fix for the 2004/5 WRXes which corrects a problem described as "Pinging during full throttle acceleration around 5000RPM."
Jon [in CT] is offline   Reply With Quote
Old 01-15-2006, 12:26 PM   #10
perkowskiforpope
Scooby Newbie
 
Member#: 50618
Join Date: Dec 2003
Chapter/Region: NESIC
Location: RI/MA
Vehicle:
2004 Crawford S2
FPgreen PSM Wagon

Default

try changing the plugs, I had my boost pulled a few times because my plugs were messed up.
perkowskiforpope is offline   Reply With Quote
Old 01-15-2006, 12:30 PM   #11
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

Quote:
Originally Posted by Jon [in CT]
The sticky'd thread deals with problems found only on 2004/5 WRXes, not a 2002 WRX. There is a fix for the 2004/5 WRXes which corrects a problem described as "Pinging during full throttle acceleration around 5000RPM."

so the fix for 04/05's doesn't work but the fix for prior MY's does? IN the thread people tried the "fix" and det still persisted, so what about the fix corrected anything? I doubt any generic flash can fix this sort of issue, but i guess it's worth a shot if they'll do it for free.
hondaeater69 is offline   Reply With Quote
Old 01-15-2006, 12:46 PM   #12
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: San Marcos, CA
Vehicle:
2016 WRX 6mt CWP

Default

I will try the dealer again. The main tech knows his stuff, but its a pain to get them to cover anything. Im out of my bumper to bumper so I have to pay 100 bucks for them to check it out, and if they dont find anythig again I am out the 100.

Thanks for the help guys.

WOuld it be worth while to hook up a friends unmarried AP and run CALI Stage I map and see if the det goes away for me?

-Jeff
JeffrWRX is offline   Reply With Quote
Old 01-15-2006, 12:53 PM   #13
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

doens't really hurt to try cobb's generic maps. IIRC some have luck with them, some don't. I would personally skip the dealer, too expensive. I can't imagine them giving you a reflash for free if you're out of warranty anyway. THey'll probably say the det is being caused by your muffler or maybe your rims. Go to a trusted shop that knows subarus and get a compression test done. If your engine is still OK, then shell out the necessary duckets for a custom tune, you obivously need it.

just my .02.
hondaeater69 is offline   Reply With Quote
Old 01-15-2006, 01:17 PM   #14
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default

Quote:
Originally Posted by 25rs92029
I will try the dealer again. The main tech knows his stuff, but its a pain to get them to cover anything. Im out of my bumper to bumper so I have to pay 100 bucks for them to check it out, and if they dont find anythig again I am out the 100.
You're in California, right? If so, your Engine Control Module is covered by Subaru's California Emissions Extended Defect Warranty for 7 years/70,000 miles. If it's determined that your pinging is due to defective ECU programming, you shouldn't have to pay anything, including diagnosis fees, to get it fixed.
Jon [in CT] is offline   Reply With Quote
Old 01-15-2006, 01:54 PM   #15
Jon [in CT]
*** Banned ***
 
Member#: 2992
Join Date: Nov 2000
Chapter/Region: NESIC
Location: Connecticut, USA
Vehicle:
02 WRX Sedan
Silver

Default

Quote:
Originally Posted by hondaeater69
wasn't this fix attempted in the stickied thread at the top of the forum (detonation casues found!) with no benefit?
No. As far as I can tell from that thread, only one person in that thread has had his ECU sent to SOA for the ping reflash and he never bothered to report whether his pinging problem was cured.
Jon [in CT] is offline   Reply With Quote
Old 01-15-2006, 02:24 PM   #16
Hondaslayer
Interpretively Paraphrasing
Moderator
 
Member#: 4562
Join Date: Feb 2001
Chapter/Region: NWIC
Location: Auburn, WA
Vehicle:
1995 Legacy LSi
2005 Chrysler Town & ****

Default

ECM is covered under the Federal emissions warranty 8/80.

If it is a programming issue you pay nothing.

Your dealer should have the SSM3 by now. If they do they can reflash it in house. Takes about 1/2 hour or so.
Hondaslayer is offline   Reply With Quote
Old 02-28-2006, 12:40 AM   #17
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: San Marcos, CA
Vehicle:
2016 WRX 6mt CWP

Default

Update...

Dealer couldn't replicate pinging/detonation, but they "reflashed my ecu to stock" so I will have to see if that makes a difference.

I jsut bought an ecu with ecutek on it. I hope a protune cures my problems.

Gonna get a compression test done before I tune it.

-Jeff

Last edited by JeffrWRX; 02-28-2006 at 01:04 AM.
JeffrWRX is offline   Reply With Quote
Old 02-28-2006, 02:24 AM   #18
MT_WRX
Scooby Specialist
 
Member#: 24409
Join Date: Sep 2002
Chapter/Region: SCIC
Location: expensivegasafornia
Vehicle:
'03 Comatose WRX
Wagon. Parked.

Default

What gas do you use? I know that my car is EXTREMELY picky about what kinda gas it gets.

Just a thought.

MT
MT_WRX is offline   Reply With Quote
Old 02-28-2006, 09:59 AM   #19
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: San Marcos, CA
Vehicle:
2016 WRX 6mt CWP

Default

CALi 91 octane Either 76 or shell
JeffrWRX is offline   Reply With Quote
Old 02-28-2006, 01:34 PM   #20
cdvma
Scooby Specialist
 
Member#: 21980
Join Date: Jul 2002
Chapter/Region: NESIC
Location: Central MA
Vehicle:
2002 PSM WRX (Sold)
2009 BMW X5

Default

Are you SURE its knock? How have you verified it? Audible knock doesn't happen for 20k miles and you not have a blown motor as a result.
cdvma is offline   Reply With Quote
Old 02-28-2006, 01:52 PM   #21
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: San Marcos, CA
Vehicle:
2016 WRX 6mt CWP

Default

lol thats what I was thinking. I never get a check engine light. But I have had boost cut to wastegate (8PSI)

I guess if I have a rattle somewhere it could be a false knock.

I just bought an ECUtek ECU and Im going to ahve it tuned, but I am paranoid that something will go wrong. We shall see.

-Jeff
JeffrWRX is offline   Reply With Quote
Old 02-28-2006, 02:09 PM   #22
ride5000
Scooby Guru
 
Member#: 32792
Join Date: Feb 2003
Chapter/Region: NESIC
Location: lincoln, ri
Vehicle:
2003 GGA MBP
12.9 / 105+

Default

Quote:
Originally Posted by hondaeater69
I doubt any generic flash can fix this sort of issue,
of course it can, as long as he does not have a mechanical problem with his engine.

a generic flash could be put on the car to run 87 octane @ 120mph all day. the car just won't make rated/advertised crank horsepower (227 in this case).
ride5000 is offline   Reply With Quote
Old 02-28-2006, 02:36 PM   #23
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

Quote:
Originally Posted by ride5000
of course it can, as long as he does not have a mechanical problem with his engine.

a generic flash could be put on the car to run 87 octane @ 120mph all day. the car just won't make rated/advertised crank horsepower (227 in this case).

yea, i suppose a generic mail order flash could work. . .let me rephrase, with the level of DET described in this thread combined with crappy cali gas, i wouldn't personally trust a generic/OTS flash/tune. If you would fine, if the OP would, fine also, but i wouldn't, not on my car.
hondaeater69 is offline   Reply With Quote
Old 02-28-2006, 02:54 PM   #24
JeffrWRX
Scooby Specialist
 
Member#: 48589
Join Date: Nov 2003
Chapter/Region: SCIC
Location: San Marcos, CA
Vehicle:
2016 WRX 6mt CWP

Default

I am getting custom tuned, so I will find out then if its a mechanical problem or tuning issue. The dealer told me if I brought them logs from a dyno run showing knock, that it would help them diagnose it.

-Jeff
JeffrWRX is offline   Reply With Quote
Old 02-28-2006, 02:58 PM   #25
hondaeater69
Scooby Guru
 
Member#: 60324
Join Date: Apr 2004
Location: a pillow.
Default

Quote:
Originally Posted by 25rs92029
I am getting custom tuned, so I will find out then if its a mechanical problem or tuning issue. The dealer told me if I brought them logs from a dyno run showing knock, that it would help them diagnose it.

-Jeff

nice. Keep us posted
hondaeater69 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
Tranny on its way out? Noise in first 04 WRX (NJ) Transmission (AT/MT) & Driveline 0 05-22-2009 01:21 AM
Suspension on its way out? Ekeenan86 Newbies & FAQs 5 04-09-2009 07:54 AM
is my tranny on the way out? BriBoogie Transmission (AT/MT) & Driveline 6 04-17-2007 09:31 PM
power steering on its way out? AJ711 Service & Maintenance 3 03-03-2005 05:23 PM
Turbo on its way out? DanMan Factory 2.0L Turbo Powertrain (EJ Series Factory 2.0L Turbo) 23 04-05-2002 03:10 PM

All times are GMT -4. The time now is 12:41 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2016 Axivo Inc.
Copyright ©1999 - 2016, North American Subaru Impreza Owners Club, Inc.