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11-11-2012, 03:23 AM | #1 |
Scooby Newbie
Member#: 307041
Join Date: Jan 2012
Chapter/Region:
BAIC
Location: Nor*Cal
Vehicle:2002 impreza wrx psm |
Boost issue in 3rd,4th & 5th gear.Bad EBCS?Turbo?Confused
So my 2002 wrx started this weird issue last week and i have been trying to find out what could cause this and wanted to see if anyone on here has had this issue or can guide me a bit.I have not gotten any CEL.When i go WOT in 3rd,4th & 5th gear my boost gauge goes up to .1(16)lbs then goes down to the .05 then back to .1(16) back to .05 then goes to .15 and just bounces and the car feels like im depressing and pressing the gas while WOT i can feel the car get boost lose boost then get boost lose boost.So far i have changed out all the lines from the EBCS (2 lines) & the line after the T to the turbo and still have the issue.What ive read was EBCS,Fuel pump,02 sensor or maybe even the Cobb AP could cause a issue??Maybe a Vac leak?I have been searching to find out how to test the EBCS but no luck here are my mods.I can take vid with cam if needed to show exactly what it is doing,i also noticed that it has been killing me on gas aswell,is that a sign of the pump?
2002 Wrx 166k miles JDM Sti V7 up pipe Cobb Sf intake HKS Down pipe Tanabe Racing Med exhaust Cobb AP Stage 2 OTS map V3.10 Map
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11-11-2012, 12:46 PM | #2 |
Scooby Newbie
Member#: 26525
Join Date: Oct 2002
Chapter/Region:
MAIC
Location: Arnold, MD
Vehicle:Sold 2002 WRX 2011 LGT Blue |
My stock '02 had this issue intermittently for a few years. Sometimes it would do it everyday for a week then it wouldn't happen again for 3 months. Because it was intermittent mechanics couldn't replicate or diagnose it. Last year I replaced the BCS with a new one and the problem hasn't resurfaced.
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11-11-2012, 03:00 PM | #3 |
Scooby Newbie
Member#: 307041
Join Date: Jan 2012
Chapter/Region:
BAIC
Location: Nor*Cal
Vehicle:2002 impreza wrx psm |
Thanks for the response ill ask my buddy if i can swap him EBCS and see what happens.Also sometimes i can keep & hold boost in 3rd and its only 4th & 5th i have the issue.One time i even just moved the lines around and the car ran fine then bam came back very weird issue..The car runs fine besides this issue and the only reason i noticed was because i was changing lanes and had to press the gas and noticed the car jerking and the gauge going crazy..
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11-11-2012, 03:32 PM | #4 |
Scooby Specialist
Member#: 321715
Join Date: May 2012
Chapter/Region:
Tri-State
Location: Philly/SJ
Vehicle:03 Big 16G WRX PSM |
Have you recently gotten your car retuned? If boost is oscillating like that then your WGDC needs to be adjusted
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11-11-2012, 10:40 PM | #5 |
Scooby Newbie
Member#: 307041
Join Date: Jan 2012
Chapter/Region:
BAIC
Location: Nor*Cal
Vehicle:2002 impreza wrx psm |
I have been running the Stage 2 V3.10 OTS map from Cobb for about 2-3 months with no issues then it started.I have been debating on selling the AP buying a Grimspeed EBCS & doing a pro tune now that i have 2 ECU's i can keep one stock and the other with a pro tune,Im just worried with the miles as i do not know much of the cars history i do know the Pro Tune would be best so that is were im at right now.Thank you all
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11-11-2012, 10:59 PM | #6 |
Scooby Specialist
Member#: 310366
Join Date: Feb 2012
Chapter/Region:
South East
Location: Lakeland, FL
Vehicle:03 Widebody Wagon |
If you changed the hoses make sure you get the restrictor pill! I had the same problem and it was because I changed the cracked hoses from the boost controller and forgot the restrictor pill so make sure you have that
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11-11-2012, 11:15 PM | #7 |
Scooby Newbie
Member#: 307041
Join Date: Jan 2012
Chapter/Region:
BAIC
Location: Nor*Cal
Vehicle:2002 impreza wrx psm |
I got the pill in the hose.I changed out the one line before and noticed that the other line was hard when checking the car out(line that goes to the intake)So just to be safe i swapped all of them out thinking that it may have just cracked etc and did not help,I have located a OEM EBCS so that will be my next step.Thanks for all the help and will update with progress aswell
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11-11-2012, 11:33 PM | #8 | |
Scooby Specialist
Member#: 321715
Join Date: May 2012
Chapter/Region:
Tri-State
Location: Philly/SJ
Vehicle:03 Big 16G WRX PSM |
Quote:
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11-12-2012, 03:30 PM | #9 |
Scooby Newbie
Member#: 307041
Join Date: Jan 2012
Chapter/Region:
BAIC
Location: Nor*Cal
Vehicle:2002 impreza wrx psm |
Yeah i have been looking at the Grimmspeed and the cobb unit the GS seems to be the popular choice i have def been looking into them and strongly leaning toward selling the AP and going pro tune.
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11-16-2012, 03:48 PM | #10 |
Scooby Newbie
Member#: 307041
Join Date: Jan 2012
Chapter/Region:
BAIC
Location: Nor*Cal
Vehicle:2002 impreza wrx psm |
Just wanted to update! Got a used OEM ebcs was told it has about 40-50k miles.All is well car feels smoother boost seems to to build slightly faster very happy thanks for all the help. Maybe look into a better system Grimspeed..
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