3inch turboback no EM causing problems? - Subaru WRX Forum
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 21 Old 02-21-2006, 03:06 PM Thread Starter
WRXtuners Member
 
eighth08's Avatar
 
Join Date: Jul 2004
Location: California
Posts: 2,457
Images: 7
eighth08 is more helpful than not
Send a message via AIM to eighth08
3inch turboback no EM causing problems?

Hey guys, i have a 3" catless turboback. never any issues besides a CEL.

ok yesturday i was coming back from the lake and you have to take this AMAZING road (video of it soon enough) well there is this turn that is literally 90 degrees but it is kinda rounded to it isnt a corner you run into, i was with some friends trying to look cool with my cool car and i gunned it hard through the apex hitting about 55mph and all of a sudden my rpms go all the way down to like 500rpm's and my whole car comes to a slow down and starts to regain speed again... i am totally guessing it was tuning issues as i know having the aftermarket exhaust with no EM can have some negetive affects, but i am curious if anyone else ran into this before.

and also i dont have a working rpm gauge cause i tried to get cute and sand the plate with the needles on and broke the rpm needle or popped it out, so i really have no idea if i was hitting my rev limiter, it seemed to be that similar outcome of hitting the rev limiter but then again i know my car and even with my rpm gauge i dont look at it cause i know where the rpm's are for the most part just by sound and feel.. so i doubt it was that but i am not ruling that out.. but lets assume it wasnt the rev limiter... what else could that have been? i think EM.

and i probably answered my own question, but i just kinda want some more people backing me up on this before i run to get an accessport with money i probably shouldnt spend right now..

Gregory-
keep it in the dirt.
eighth08 is offline  
Sponsored Links
Advertisement
 
post #2 of 21 Old 02-21-2006, 03:12 PM
WRXpert
 
bigbadbuddha's Avatar
 
Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,747
Images: 15
bigbadbuddha is more helpful than not
Send a message via AIM to bigbadbuddha Send a message via MSN to bigbadbuddha
Yo dog. You don't have alot of luck these days do ya.... I feel you.... Me personally i have never heard that before. Did it feel the same as when you hit the limiter or is it different?
I'm gonna talk to some of my peeps that are subie experts... I'll get back to you.

Big Jae -
JDM version 7 bugeye
bigbadbuddha is offline  
post #3 of 21 Old 02-21-2006, 03:17 PM Thread Starter
WRXtuners Member
 
eighth08's Avatar
 
Join Date: Jul 2004
Location: California
Posts: 2,457
Images: 7
eighth08 is more helpful than not
Send a message via AIM to eighth08
it felt like the limiter kicked in really but i know i wasnt that high in the rpms.. i mean the rpms were up there but probably like high 5k's to low low 6k's...

i really think it is EM cause i know our ecu's act funny when they get confused. this would be the first time its happened since my turboback.

Gregory-
keep it in the dirt.
eighth08 is offline  
post #4 of 21 Old 02-21-2006, 04:33 PM
WRXtuners Member
 
genkidama20's Avatar
 
Join Date: Oct 2004
Location: North Carolina
Posts: 369
Images: 5
genkidama20 is more helpful than not
Send a message via AIM to genkidama20
Never experienced it myself, but I've read about it before...

Fuel Cut
Its fuel starvation at the fuel pump pick up. Subaru found this problem and on the v7 Type RA Spec C they included a baffle on the fuel pump pickup. Bad design. Happens mostly on hard left handed turns due to the positioning/design of the fuel pump inside the tank. Possible solutions I've read about:

1) Upgrade to a Walbro 255 fuel pump.
2) Upgrade to a Version7 Type RA Spec C STi fuel pump
3) LOL, that was one long name for an STi
4) Swirl Pot (dunno what this is, just heard about it)
5) Reservoir tank. An extra gas tank basically.
6) And last but not least, Get a new fuel filter.

Good luck... there are a lot of people on NASIOC who have run into this problem. Try searching there.
genkidama20 is offline  
post #5 of 21 Old 02-21-2006, 05:17 PM Thread Starter
WRXtuners Member
 
eighth08's Avatar
 
Join Date: Jul 2004
Location: California
Posts: 2,457
Images: 7
eighth08 is more helpful than not
Send a message via AIM to eighth08
Quote:
Originally Posted by genkidama20
Never experienced it myself, but I've read about it before...

Fuel Cut
Its fuel starvation at the fuel pump pick up. Subaru found this problem and on the v7 Type RA Spec C they included a baffle on the fuel pump pickup. Bad design. Happens mostly on hard left handed turns due to the positioning/design of the fuel pump inside the tank. Possible solutions I've read about:

1) Upgrade to a Walbro 255 fuel pump.
2) Upgrade to a Version7 Type RA Spec C STi fuel pump
3) LOL, that was one long name for an STi
4) Swirl Pot (dunno what this is, just heard about it)
5) Reservoir tank. An extra gas tank basically.
6) And last but not least, Get a new fuel filter.

Good luck... there are a lot of people on NASIOC who have run into this problem. Try searching there.

but would one cylinder cause it to really drop that hard in power? i understand the third cylinder is kinda lacking with fuel supply. i was thinking eventually i will need a new fuelpump, and i was thinking walbro 255.. and i am still thinking about the perrin fuelrail which delivers proper fuel to all 4 cylinders.

but i still think it had something to do with tuning.. but physical fuel delivery wouldnt suprise me either.

Gregory-
keep it in the dirt.
eighth08 is offline  
post #6 of 21 Old 02-21-2006, 06:58 PM
WRXtuners Member
 
WRXtreme's Avatar
 
Join Date: Mar 2003
Location: Pennsylvania
Posts: 1,654
WRXtreme is more helpful than not
Send a message via AIM to WRXtreme
eighth08, I don't think the problem is that one cylinder is getting a loss in fuel, its that the entire engine is getting a loss in fuel because the pump can't pick any fuel up in a hard left hand turn.
WRXtreme is offline  
post #7 of 21 Old 02-21-2006, 07:16 PM Thread Starter
WRXtuners Member
 
eighth08's Avatar
 
Join Date: Jul 2004
Location: California
Posts: 2,457
Images: 7
eighth08 is more helpful than not
Send a message via AIM to eighth08
but it was a hard right turn and i was straightened out at that point going forward.. thats what throws me off.

Gregory-
keep it in the dirt.
eighth08 is offline  
post #8 of 21 Old 02-21-2006, 10:27 PM
WRXtuners Member
 
WRX_JUNKI's Avatar
 
Join Date: Oct 2005
Location: New York
Posts: 630
Images: 5
WRX_JUNKI is an unknown
Send a message via AIM to WRX_JUNKI
Boost cut? Heard when you get boost cut its like hitting a brick wall so maybe it was that. Just trying to help out.

Keith
WRX_JUNKI is offline  
post #9 of 21 Old 02-22-2006, 02:34 AM
WRXtuners Member
 
9d2TSi's Avatar
 
Join Date: Mar 2005
Location: Michigan
Posts: 3,171
Images: 5
9d2TSi is more helpful than not
Send a message via AIM to 9d2TSi Send a message via MSN to 9d2TSi
Actually, that would be fuel cut.

My car is well, it's like 10 lbs of shit in a 5 lb bag...

<------ Click to see what I'm workin' with. ;)
9d2TSi is offline  
post #10 of 21 Old 02-22-2006, 09:11 AM
WRXtuners Member
 
Cosmo's Avatar
 
Join Date: Dec 2002
Location: Virginia
Posts: 4,591
Images: 15
Cosmo is known to be trustworthy and helpful Cosmo is known to be trustworthy and helpful
Send a message via AIM to Cosmo
You just hit too many RPM's and hit your fuel cut. Nothing to worry about. You don't need to upgrade anything, you just need a working tachometer.
Cosmo is offline  
post #11 of 21 Old 02-22-2006, 03:07 PM Thread Starter
WRXtuners Member
 
eighth08's Avatar
 
Join Date: Jul 2004
Location: California
Posts: 2,457
Images: 7
eighth08 is more helpful than not
Send a message via AIM to eighth08
do you mean fuel cut from like a rev limiter, or fuel cut from like pushing it too hard. cause i know i wasnt that high in rpms. they sounded high but the motor did not sound like it was redlining by any means. and i know my engine pretty well. but then again i have no 100% opinion on that cause i do not have a working tach... time to get me an STi gauge cluster... cause there is no way i am getting my wrx cluster fixed.. might as well save up and just get the sti one.. mainly cause i like how it looks with the pretty colors...

but anyways i am gonna push my car around and see.. cause this is the first time my car has done this since the downpipe install.. so thats why i questioned it, cause i have pushed my car hard with the downpipe and its never gave me any problems.

either way i wanna tune my car with a stage 2 map with the accessport... to make sure, and cause it would be some nice added power and i would feel secure about the downpipe being put to it's full potential.

i hope i did hit fuel cut though, and that it is nothing serious.

Gregory-
keep it in the dirt.
eighth08 is offline  
post #12 of 21 Old 02-22-2006, 11:33 PM
WRXtuners Member
 
WRXtreme's Avatar
 
Join Date: Mar 2003
Location: Pennsylvania
Posts: 1,654
WRXtreme is more helpful than not
Send a message via AIM to WRXtreme
When you hit the rev limited the engine suddenly stops reving for about a few seconds no matter how you hit the gas and then kicks back on. Maybe you were to worried about the turn and didn't notice the RPMs or the sound of the engine that much. That would be the easiest thing to diagnose.
WRXtreme is offline  
post #13 of 21 Old 02-23-2006, 09:57 AM
Vew
Moderator
 
Vew's Avatar
 
Join Date: Feb 2004
Location: West Virginia
Posts: 3,452
Images: 10
Vew is more helpful than not
Send a message via AIM to Vew
If anyone is curious, a reservoir tank is usually a small cylinder acting as a buffer. It is NOT recommended for street cars since it is difficult to place it in a safe location that will be effective. I read about this when I started to get into autoxing.

Jon
"We live for a good time, not a long time."
RIP Colin McRae
Vew is offline  
post #14 of 21 Old 02-24-2006, 06:03 PM Thread Starter
WRXtuners Member
 
eighth08's Avatar
 
Join Date: Jul 2004
Location: California
Posts: 2,457
Images: 7
eighth08 is more helpful than not
Send a message via AIM to eighth08
Quote:
Originally Posted by WRXtreme
When you hit the rev limited the engine suddenly stops reving for about a few seconds no matter how you hit the gas and then kicks back on. Maybe you were to worried about the turn and didn't notice the RPMs or the sound of the engine that much. That would be the easiest thing to diagnose.

yeah i got that part, i just am 99.9% sure that it wasnt very high in rpm's... the motor did not sound like it was screaming.. it was loud but seriously not redline loud, thats what concerns me. oh well i will just assume it was the rev limiter until it happens again.

Gregory-
keep it in the dirt.
eighth08 is offline  
post #15 of 21 Old 02-24-2006, 11:05 PM
WRXtuners Member
 
Join Date: Feb 2006
Location: Connecticut
Posts: 158
koolpaul1082 is an unknown
this may be a stupid question, but how gas did you have in the tank at the time?
koolpaul1082 is offline  
Sponsored Links
Advertisement
 
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 Off
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome