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01-15-2021, 02:15 PM | #1 |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
New to the Subaru cars with issues
Just picked up a 2006 Subaru Impreza WRX about 3 weeks ago with 136k.
Details of the car other then the above. Current modifications done by previous owner: Invidia turbo back exhaust, Go Fast Bits recirculating BOV, COBB access port, and a COBB electronic boost controller. What I have done is switch all lighting to LEDs with the LED flasher relay as well, brand new front Brembo brake pads, coated rotors, and 4 piston coated calipers. I have stainless steel lines front and rear ready to go on the car next. After receiving the car, as I do with every car I buy, I go through it to ensure its sound and nothing is wrong. I have replaced oil/filer, air filter, checked tires, and the routine maintenance. Within this time frame I have had a few issues I cannot seem to get rid of. First being my over charging issue. Now I have don't many things to remedy this issue. I first tested my alternator and battery. Alternator was showing over charging so I went ahead and replaced that. Still showing that I was over charging. So I replaced the battery and cleaned grounds and replaced positive cable that had corrosion on it. Now it still has a over charging issue. I have done a test to rule out wiring where, while the vehicle is running, I have a volt meter on the battery which shows 15v-15.2v. Now I disconnect the alternator plug from the alternator and the voltage drops down to the regular 12.3v and will drop as the car is using the power only from the battery now. I am at a loss at what this could be other then a bad ECU/ECM or a bad tune from the previous tuner. Second issue, when I first bought the car it had a soft pedal, softer then what I like. Try pushing about 50% pedal then getting firm soft. Now above I mentioned I replaced all front brakes including calipers. I bleed them the first time during this part change and it got worse. I would say maybe 10% worse. I bleed them during the part change doing the old push the brake pedal hold and open the bleeder. Now after a week of driving I went back and used my pressure bleeder. This resulted in ZERO air coming from the lines when I cracked them open. Now after this process I DID have a slight increase in pedal response. But it is still now where I would like it to be. With the above mention of replacing the lines with stainless steel. I hope to increase it a little more if not fix it entirely. I have not ruled out my master cylinder yet, but it is a little further down on the list. Thank you for reading as I hope to expand my knowledge on these cars as a first time Subaru owner.
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01-15-2021, 02:22 PM | #2 |
Add Lightness
Moderator Member#: 13699
Join Date: Dec 2001
Chapter/Region:
NESIC
Location: Hopkinton, MA
Vehicle:2021 Building It Better |
06 is ancient enough that the brake lines could use at least a good inspection and maybe replacement. Doing teflon center, stainless braided covered should give you slightly firmer feel. If it gives you a big improvement, the OEM rubber lines were seriously borked. I'd consider just replacing the mc. They're not overly expensive or difficult to replace. Bench bleed the mc to avoid hours of heart ache.
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01-15-2021, 02:27 PM | #3 | |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
Quote:
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01-15-2021, 02:48 PM | #4 |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
I'd also recommend a MC brace. You'd be amazed at how much the firewall flexes during initial stroke. Combination of brace and SS line make a fair difference in feel.
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01-15-2021, 02:50 PM | #5 |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
I have never heard of such a thing? I track a 98' Cobra mustang and don't even have one of those. Is this only a Subaru thing and any brands I should get over others?
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01-15-2021, 03:58 PM | #6 |
Scooby Specialist
Member#: 395793
Join Date: Jul 2014
Chapter/Region:
Tri-State
Location: SLC and Lake Placid
Vehicle:2005 92x Aero Beige |
GrimmSpeed makes a good one. But they all work for their purpose.
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01-15-2021, 06:37 PM | #7 |
Scooby Guru
Member#: 487
Join Date: Nov 1999
Chapter/Region:
TXIC
Location: Houston TX
Vehicle:1998 /2005 STunIcorn Acadia Green USDM 22b |
That over charging issue baffles me too
Only thing I can think of is prior owner has incorrect crank pulley on car ??????? I remember back in the day lots of owners bought/installed those lite weight pulleys Those did the opposite thou.....dimming headlamps at idle Keep us posted! |
01-16-2021, 07:53 AM | #8 | |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
Quote:
Thanks for the insight on the changing of pulleys. |
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01-20-2021, 02:33 PM | #9 | |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
UPDATE on both issues
Quote:
Brake issue update: I replaced all lines with stainless steel and bleed them again with a pressure bleeder. This did nothing to help with the pedal feel other then once I do get a little resistance it was instant, still had to press about 60% down before that point. I was told by another Subaru owner to bleed the brakes with the car on. I was thrown back by this statement due to bleeding brakes numerous times and never had a vehicle on and no one else I know has either, multiple mechanics within those people. Round #4 or 5 of bleeding brakes I decided to try and bleed the brakes with the pressure bleeder and car ON. I had my doubts but I tried it anyway. After I was done and car was off, I had a firm pedal. Start the car and drive it down the road a big and wow. About 80% pedal feel increased. I was amazed that the trick even worked. I have no idea how or why, but I am happy to have most of my pedal feel back to normal. I feel like this trick could also be done by modulating the ABS with a scan tool during the bleed process, but I did not have that at the time. Thank you for reading and the info. |
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01-20-2021, 03:30 PM | #10 |
Scooby Newbie
Member#: 469678
Join Date: Jun 2017
Chapter/Region:
E. Canada
Location: Canada
Vehicle:2010 STI hatch Silver |
I dont understand how a faulty 10a fuse would cause an overcharging issue. Can someone please explain this for me?
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01-20-2021, 04:06 PM | #11 | |
Scooby Guru
Member#: 487
Join Date: Nov 1999
Chapter/Region:
TXIC
Location: Houston TX
Vehicle:1998 /2005 STunIcorn Acadia Green USDM 22b |
Quote:
-crazy about that fuse.....but f-it.....job done -I was about to type bleed with car on...….but re-read and another job done! I was having the same issue with brake pedal feel after my swap (brembos) found that once I got a STI booster....was 60% better....then the bleedfest began. im serious, I lost friends bc I/multiple friends bled brakes like 8 times. finally did bleed job with car running and got up to acceptable pedal feel. now im foggy if your car came with Brembos or calipers with 2 bleeder screws on inside and outside, but later I found out that there is a specific order to do outside caliper and inside caliper bleed screws. I seriously was bled out.....didnt try it. I broke the bank with what seemed like hundreds of bottles of brake fluid cheers man! |
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01-21-2021, 03:59 PM | #12 |
Scooby Specialist
Member#: 491095
Join Date: Sep 2018
Chapter/Region:
SWIC
Location: New Mexico
Vehicle:2009 STi Blue Blue |
based on my work at a different dealership, the issue is the brake fluid doesn't travel correctly through the ABS...i also don't fully understand it, but similarly bleed them the way i have for the last 30 years and squishy pedal...vehicle running and bleed and perfect pedal...
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01-22-2021, 02:09 PM | #13 | |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
Quote:
I've only went though 1.5 bottles of DOT 4 fluid so far. I am ordering new rear calipers, pads, parking brake, and rotors to hopefully 100% get a pedal that I am familiar with. Worst case I do have a master cylinder that is brand new, but it will be a last resort. I also did end up grabbing one of those master cylinder braces as well. As I am skeptical that will help much, but worth a try for just a $100. |
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01-22-2021, 02:11 PM | #14 | |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
Quote:
Now this is just from my knowledge I have of electronics and working on cars in the years. |
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01-22-2021, 02:34 PM | #15 |
Scooby Newbie
Member#: 508145
Join Date: Nov 2019
Chapter/Region:
MWSOC
Vehicle:2007 WRX Wagon Satin White Pearl |
my tuner said that master cylinder braces are usually meant for the 08-14 as the firewall can crack. I believe he said they do help on our chassis with brake feel but that ss lines are much more dramatic
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01-22-2021, 02:36 PM | #16 |
Scooby Newbie
Member#: 521692
Join Date: Jan 2021
Location: Bristol, IN
Vehicle:2006 Impreza WRX Blue |
I have already installed stainless lines at all four corners. I bought the brace if that and bleeding while on did not help. And as I have it now, might as well throw it on there.
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