Welcome to the North American Subaru Impreza Owners Club Sunday May 29, 2016
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Built Motor Discussion

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 09-20-2010, 10:54 PM   #26
Csquared33
Scooby Specialist
 
Member#: 198053
Join Date: Dec 2008
Chapter/Region: Tri-State
Location: Danbury, CT
Vehicle:
93 2JZ something

Default

Quote:
Originally Posted by fourseasonsandles View Post
The car was tuned the day before this happened on the very same plugs. Also, the car was being boosted a couple times before this issue came up. 2-3 WOT pulls before this came up.

Car made 388whp on these plugs on EFI's Mustang dyno.



Hadnt checked. I can do that though. What are you getting at? gas in the oil from a cylinder not firing?



Yes, 06s are side feed. What are you referring to as the cap? The gray cap on top of the injector or the plug? All the injectors are firing as far as I can tell. I put a long screw driver up to each one and listened and could hear each one firing.

Bad tank of gas is a possibility. I filled up at BJs on 93 like I always do. No changes there. But as above, I filled up and drove the car hard for a few pulls on this very same tank of gas and it was fine for those pulls. Why would the quality of the gas suddenly change?



This is not a tuning issue. The car ran fine for the 345mile drive home from EFI and the next morning. However, if the car was tuned with a problem and then I fixed the problem, that could make it wack out..
if it smells like gas, then you are running extremely rich. what im getting at is that dw had a production run of injectors that had flimsy caps on the tip of the injector that hold the bottom oring on. if that fell off, then the injector will still fire, but with no oring to seal the rail, fuel is just dumped into that cylinder. im not saying that that is the issue, but it sounds all too familiar. dont drive it until you figure out the issue.
* Registered users of the site do not see these ads.
Csquared33 is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 09-20-2010, 11:33 PM   #27
Garrek11
*** Banned ***
 
Member#: 227747
Join Date: Oct 2009
Chapter/Region: NWIC
Location: Spokane WA
Vehicle:
2006 STI (BW S363)
SGM

Default

sounds like a injector is sticking open or flowing more cc then what it is tuned for.
Garrek11 is offline   Reply With Quote
Old 09-21-2010, 01:36 AM   #28
RexFTW
Scooby Specialist
 
Member#: 107179
Join Date: Feb 2006
Chapter/Region: MWSOC
Location: Bensenville, IL
Vehicle:
S4, WRX
1.27 60', 9.37 1/4

Default

I had very similar symptoms (as far as shaking and air fuel oddities anyway) and just found out the problem today was that my fuel pump took a crap on me. It's worth a look if you have had that pump for a while; mine lasted ~2 years.
RexFTW is offline   Reply With Quote
Old 09-21-2010, 08:10 AM   #29
stihellride2005
Scooby Specialist
 
Member#: 71606
Join Date: Sep 2004
Chapter/Region: MAIC
Location: Hagerstown, Maryland
Vehicle:
07 STI
WRB

Default

Quote:
Originally Posted by Garrek11 View Post
sounds like a injector is sticking open or flowing more cc then what it is tuned for.

This could very well be the issue. You should be able to hear or at least feel the injectors "click" when you turn the key and power is applied. Try having someone cycle the key off and on while you hold each injector and feel for the click. You don't have to remove the injectors as long as you can touch the side of each one of them. If it clicks it's working.
stihellride2005 is offline   Reply With Quote
Old 09-21-2010, 09:47 AM   #30
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

Quote:
Originally Posted by Csquared33 View Post
if it smells like gas, then you are running extremely rich. what im getting at is that dw had a production run of injectors that had flimsy caps on the tip of the injector that hold the bottom oring on. if that fell off, then the injector will still fire, but with no oring to seal the rail, fuel is just dumped into that cylinder. im not saying that that is the issue, but it sounds all too familiar. dont drive it until you figure out the issue.
Gotcha. I wasnt aware of this issue. I smelled the oil, but I have cold, so that didnt help much. Im going to pull the injectors today to see if anything strange is going on.

Quote:
Originally Posted by Garrek11 View Post
sounds like a injector is sticking open or flowing more cc then what it is tuned for.
After I put on the new map and started the car, it went extremely rich to 11ish on my wideband and hung around 12afr until the car started to warm up and settled back to 14.7.

Also when I give it just about any amount of throttle, say, 20% and up, my wideband immediately jumps to 10. Normally I wouldnt bring this up, but I havent driven the car long enough to know if this is normal or not. I remember Chris telling me it would run rich on WOT because that is how he tuned it, but it goes right to 10afr for any amount of boost.

I have brought this to his attention as well as see what he has to say. I did also get a response from Deatschwerks about returning the injectors to have them tested if needed.

Quote:
Originally Posted by RexFTW View Post
I had very similar symptoms (as far as shaking and air fuel oddities anyway) and just found out the problem today was that my fuel pump took a crap on me. It's worth a look if you have had that pump for a while; mine lasted ~2 years.
Pretty sure it isnt the fuel pump.

Quote:
Originally Posted by stihellride2005 View Post
This could very well be the issue. You should be able to hear or at least feel the injectors "click" when you turn the key and power is applied. Try having someone cycle the key off and on while you hold each injector and feel for the click. You don't have to remove the injectors as long as you can touch the side of each one of them. If it clicks it's working.
I know they are working. I already tried this method above with a long screw driver. Everyone of them was clicking.
fourseasonsandles is offline   Reply With Quote
Old 09-21-2010, 01:28 PM   #31
Rick Hunter
Scooby Newbie
 
Member#: 825
Join Date: Jan 2000
Location: Kanada
Vehicle:
2002 wrx

Default

Just throwing this out there - have you checked/cleaned your MAF sensor? Could be that a drop of oil has fouled it up. Happened to me after over-oiling my air filter. The over rich symptom started to happen on the drive 20-30 minutes later, only after running the car hard. Washed it out in a zip-lock bag with brake cleaner, ran like a charm thereafter.
Rick Hunter is offline   Reply With Quote
Old 09-21-2010, 07:41 PM   #32
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

Quote:
Originally Posted by Rick Hunter View Post
Just throwing this out there - have you checked/cleaned your MAF sensor? Could be that a drop of oil has fouled it up. Happened to me after over-oiling my air filter. The over rich symptom started to happen on the drive 20-30 minutes later, only after running the car hard. Washed it out in a zip-lock bag with brake cleaner, ran like a charm thereafter.
Ill buy some cleaner and check it out. It is on a brand new K&N filter.

I have a wicked cold and just got back from work tonight, so nothing is happening real soon.
fourseasonsandles is offline   Reply With Quote
Old 09-22-2010, 09:02 PM   #33
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

Picked up 8 new spark plugs to try a new set. Also picked up 2 new coil packs to see if that helps anything.

If that doesnt work, i am going to pull the injectors and have them sent to DW to be tested again. I have been trading emails with DW and their customer service has been awesome!
fourseasonsandles is offline   Reply With Quote
Old 09-23-2010, 06:59 AM   #34
Garrek11
*** Banned ***
 
Member#: 227747
Join Date: Oct 2009
Chapter/Region: NWIC
Location: Spokane WA
Vehicle:
2006 STI (BW S363)
SGM

Default

^^^Ya they are really good. If they cant find a prob with them you might wanna send them to witchhunter to have them flow tested and clean.
Garrek11 is offline   Reply With Quote
Old 09-23-2010, 05:09 PM   #35
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

OK, I have a plan. I emailed Chris at EFI to get some incite if he thinks we can fix this in a day or not. If we can, Ill just take the Suby out there. If not, Ill have to have Amanda follow me in the focus and leave the Suby there to have them sort it out.

I still have to try my spark plugs and coil packs, but if that doesnt work, I think I am dead in the water because I really dont think it has anything to do with the injectors.
fourseasonsandles is offline   Reply With Quote
Old 09-23-2010, 08:06 PM   #36
crashtke
Scooby Specialist
 
Member#: 120912
Join Date: Jul 2006
Chapter/Region: South East
Location: Atlanta, GA
Default

How do/did the fuel trims look when out of boost?
crashtke is offline   Reply With Quote
Old 09-23-2010, 08:26 PM   #37
woodys77
Scooby Specialist
 
Member#: 192147
Join Date: Oct 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2007 STI EfiLogics
422whp 421wtq fpgreen

Default

its your first o2 sensor.........well it was for me anyways. no CEL and the same symptoms as you, try it.
woodys77 is offline   Reply With Quote
Old 09-23-2010, 08:43 PM   #38
kasra007
Scooby Specialist
 
Member#: 225361
Join Date: Sep 2009
Chapter/Region: MAIC
Location: ashburn, va
Vehicle:
2006 wrx sti
beige

Default

is 120 psi on a cold motor good? i thought it was suppose around 140ish.
kasra007 is offline   Reply With Quote
Old 09-23-2010, 08:57 PM   #39
woodys77
Scooby Specialist
 
Member#: 192147
Join Date: Oct 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2007 STI EfiLogics
422whp 421wtq fpgreen

Default

140ish is warm sti comp
woodys77 is offline   Reply With Quote
Old 09-24-2010, 10:24 PM   #40
woodys77
Scooby Specialist
 
Member#: 192147
Join Date: Oct 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2007 STI EfiLogics
422whp 421wtq fpgreen

Default

NVM it wasnt my o2 good luck
woodys77 is offline   Reply With Quote
Old 09-25-2010, 01:05 AM   #41
eastcoastbumps
Scooby Guru
 
Member#: 29201
Join Date: Nov 2002
Chapter/Region: NESIC
Location: Shrewsbury, MA
Vehicle:
BMW M3
Honda S2000x2

Default

Have you checked all your intercooler piping?
eastcoastbumps is offline   Reply With Quote
Old 09-25-2010, 09:45 AM   #42
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

Quote:
Originally Posted by crashtke View Post
How do/did the fuel trims look when out of boost?
Here is my latest log driving around town
https://spreadsheets.google.com/ccc?...VE&hl=en#gid=0

Quote:
Originally Posted by woodys77 View Post
its your first o2 sensor.........well it was for me anyways. no CEL and the same symptoms as you, try it.
No, it is not. I have a brand new front and rear o2 in the car.

Quote:
Originally Posted by kasra007 View Post
is 120 psi on a cold motor good? i thought it was suppose around 140ish.
Quote:
Originally Posted by woodys77 View Post
140ish is warm sti comp
This is a built block with forged pistons. There is a bit more clearance then the stock motor. I expected lower compression numbers on this engine

Quote:
Originally Posted by eastcoastbumps View Post
Have you checked all your intercooler piping?
The very first thing I did was boost leak test it

It appears a lot of you are not reading the rest of the thread. The car is no longer lean and the engine is not shaking. That issue was fixed. It was an unplugged coil pack on #4.

The coil pack has since been plugged in and the car runs great at idle and around town. It just goes crazy with any amount of boost.

Last edited by fourseasonsandles; 09-25-2010 at 03:13 PM.
fourseasonsandles is offline   Reply With Quote
Old 09-25-2010, 11:23 AM   #43
woodys77
Scooby Specialist
 
Member#: 192147
Join Date: Oct 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2007 STI EfiLogics
422whp 421wtq fpgreen

Default

Quote:
Originally Posted by fourseasonsandles View Post

It just goes crazy with any amount of boost.
thats exactly what mine is doing, im starting to think bad coil pack????
woodys77 is offline   Reply With Quote
Old 09-25-2010, 03:11 PM   #44
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

Quote:
Originally Posted by woodys77 View Post
thats exactly what mine is doing, im starting to think bad coil pack????
I thought that too, that is why I have 2 of them on the way. I am going to install them on Cyl 2 and 4 as #4 is where it was barely plugged in with the first problem.

If that doesnt fix it, I have an appointment at EFI on Oct 5th to sort it out.
fourseasonsandles is offline   Reply With Quote
Old 09-26-2010, 02:33 PM   #45
woodys77
Scooby Specialist
 
Member#: 192147
Join Date: Oct 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2007 STI EfiLogics
422whp 421wtq fpgreen

Default

Quote:
Originally Posted by fourseasonsandles

I thought that too, that is why I have 2 of them on the way. I am going to install them on Cyl 2 and 4 as #4 is where it was barely plugged in with the first problem.

If that doesnt fix it, I have an appointment at EFI on Oct 5th to sort it out.
I'm starting to think it may be my maf sensor, I did a log and when it starts to break up I'm pulling 292gs at 8psi 4500 rpm! I don't think that's even possible with a good sensor? If this don't work then I'm going back to efi.
woodys77 is offline   Reply With Quote
Old 09-26-2010, 02:52 PM   #46
renosubby
Scooby Specialist
 
Member#: 152576
Join Date: Jun 2007
Chapter/Region: SWIC
Location: Reno, NV
Vehicle:
2009 GTR 10.7@ 133
Mayhem Tuning!!!!!

Default

Pull the injectors out you will see, on the side that goes into the head, little grey caps on the end of the injector! If they are gone you car will run like crap! I had a set of the 740cc do this... they sent me new caps and I am good now! this should fix your problem for sure and not have to get re tuned!
renosubby is offline   Reply With Quote
Old 09-27-2010, 12:49 PM   #47
woodys77
Scooby Specialist
 
Member#: 192147
Join Date: Oct 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2007 STI EfiLogics
422whp 421wtq fpgreen

Default

tried a buddies maf today and guess what....................it didnt fix it!!! please let us/me know what you guys find.
woodys77 is offline   Reply With Quote
Old 09-27-2010, 01:28 PM   #48
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

Quote:
Originally Posted by renosubby View Post
Pull the injectors out you will see, on the side that goes into the head, little grey caps on the end of the injector! If they are gone you car will run like crap! I had a set of the 740cc do this... they sent me new caps and I am good now! this should fix your problem for sure and not have to get re tuned!
I was told by DW if the caps came off of the injectors, the car wouldnt run. I can still check it out though.

Did you car idle and drive around town OK? Mine only has issues under boost and that is it.
fourseasonsandles is offline   Reply With Quote
Old 10-01-2010, 09:21 PM   #49
fourseasonsandles
Scooby Specialist
 
Member#: 94816
Join Date: Aug 2005
Chapter/Region: Tri-State
Vehicle:
06 STI EFI Tuned
EFI Block, GTX30, 278s

Default

Got my new/used coil packs today. No change. Still goes mega rich under anything other than super light throttle and bucks/vibrates under any boost. I reset the computer and in closed loop while the car is warming up, the car is still running stupid rich. I just boost leak tested it again and it is solid. Holds pressure very nicely.

I dont have a damn clue what is up. Im going to pack up and leave it until Tues when I got back to EFI to see if they can sort it out. Honestly I am tired of messing with the damn car and perfectly happy to let someone else figure it out so I can drive the ****ing thing again.

The positive on this. Even when I am stressed out and hating life, just getting in the car and driving around makes me feel better. Just to hear the engine/cams and the rumble. I really miss my car
fourseasonsandles is offline   Reply With Quote
Old 10-01-2010, 09:41 PM   #50
woodys77
Scooby Specialist
 
Member#: 192147
Join Date: Oct 2008
Chapter/Region: NESIC
Location: Maine
Vehicle:
2007 STI EfiLogics
422whp 421wtq fpgreen

Default

Fml!!!!!

Last edited by woodys77; 10-07-2010 at 11:32 PM.
woodys77 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
Studder and shake at idle and through 1st gear (low rpm) blusubaru Service & Maintenance 16 10-24-2009 05:07 AM
My car shakes at idle, vacuum goes to -25 at rev... leak?? elitescouter Newbies & FAQs 18 07-10-2009 02:24 AM
Was just tuned yesterday Pomorski Proven Power Bragging 7 12-01-2007 03:33 PM
P0136 and engine shakes at idle polishguy29 Normally Aspirated Powertrain 5 10-18-2006 03:30 PM

All times are GMT -4. The time now is 07:19 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.