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10-19-2009, 03:11 PM | #1 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
WTF, need some input
So this summer some of you knew I had some problems with my STI and misfires on cyl. 2 and 4. Well for the last couple months I have not been driving it and have been saving for a new engine.
Well I took it to a local shop for a comp test and leak down test to make damn sure it was the engine before I purchased a new short block. Results were 110 across the board....? So now to what is causing the misfire. The mechanic told me it may be an intake manifold leak? The car has all new injectors, I have tried new coilpacks, new ngk plugs one step colder. All I know is that I am super stoked now but I still have problems. Anyone else ever have this problem? Mods are; FP green, PE850, FMIC, 3" Catless and I am not sure if any of the other mods really matter. I know when John was tuning my car cyl 2 and 4 had a slight roughness and he was having troubles tuning it. Help please!
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10-19-2009, 03:14 PM | #2 |
Scooby Guru
Member#: 99397
Join Date: Oct 2005
Chapter/Region:
RMIC
Location: Clinton, UT
Vehicle:15 WRX, 83 DR30, 93 R32 GTS-T, 93 R32 GTR |
aftermarket flywheel?
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10-19-2009, 03:20 PM | #3 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
nope, stock clutch and flywheel
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10-19-2009, 03:22 PM | #4 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
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10-19-2009, 03:25 PM | #5 | |
Scooby Guru
Member#: 99442
Join Date: Oct 2005
Chapter/Region:
International
Location: Man of Mystery
Vehicle:2006 SGM STI I'm on CORN YO! |
Quote:
You need a better tune. I would change maps and see if it clears up the problem.... You are not the first person I have heard about with misfire codes from Johns tune. |
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10-19-2009, 03:45 PM | #6 |
Scooby Specialist
Member#: 158043
Join Date: Aug 2007
Chapter/Region:
RMIC
Location: SLC
Vehicle:2013 Wrx Hatch SWP |
You were out at tear apart auto this weekend wern't you!.
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10-19-2009, 05:40 PM | #7 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
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10-20-2009, 12:51 AM | #8 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
the shop also pulled these codes, which are new to me.
P0122 Throttle position sensor circuit low input P0123 Throttle position sensor circuit high input |
10-20-2009, 09:00 AM | #9 |
Scooby Guru
Member#: 99442
Join Date: Oct 2005
Chapter/Region:
International
Location: Man of Mystery
Vehicle:2006 SGM STI I'm on CORN YO! |
Sometimes when I tinker with my car I get those cars on initial start up. I reset and they don't come back. Are yours coming on all the time?
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10-20-2009, 10:13 AM | #10 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
yeah, I am guessing those two codes are the culprits when my car goes into limp mode. I will just be driving and all of a sudden it will just die out until it goes under 3k rpm and then it feels like i am driving a honda and it wont let me rev over 3k rpms.
It did this to me a few times while driving to SLC this weekend, it sucks when you are going down the free way and your car just dies out, haha. |
10-20-2009, 11:28 AM | #11 |
Scooby Specialist
Member#: 127704
Join Date: Oct 2006
Chapter/Region:
TXIC
Location: TX/Austin
Vehicle:2015 Boosted Stang MAP tuned |
Check the wiring connections on your throttle inlet/ DBW unit, check connectors for pinches or frays, maybe even moisture breakdown dude.
Have you had the IC off recently? or any work in that area? |
10-20-2009, 11:59 AM | #12 |
Scooby Specialist
Member#: 143264
Join Date: Mar 2007
Chapter/Region:
RMIC
Location: Utah
Vehicle:2006 WRX TR Obsidian Black Pearl |
Your AVCS Solenoid on cyl. #2 and #4 may be going bad.
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10-20-2009, 12:21 PM | #13 | |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
Quote:
Do these commonly go out and cause misfire codes? I am not to familiar with the AVCS. |
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10-20-2009, 02:03 PM | #14 |
Scooby Specialist
Member#: 143264
Join Date: Mar 2007
Chapter/Region:
RMIC
Location: Utah
Vehicle:2006 WRX TR Obsidian Black Pearl |
Not super common, but they do go out. When they go bad you will get misfires.
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10-20-2009, 02:46 PM | #15 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
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10-20-2009, 02:51 PM | #16 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
I think I am going to pull the AVCS banjo bolt filter out, hopefully that helps with my Idle issues.
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10-20-2009, 04:23 PM | #17 |
Scooby Specialist
Member#: 143264
Join Date: Mar 2007
Chapter/Region:
RMIC
Location: Utah
Vehicle:2006 WRX TR Obsidian Black Pearl |
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10-21-2009, 10:36 PM | #18 |
Scooby Specialist
Member#: 199522
Join Date: Jan 2009
Chapter/Region:
RMIC
Location: Elko, NV
Vehicle:2004 Impreza STi PsM |
Ok, well its going to Solid on the 30th to install my EWG setup and try to find my issues.
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