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Old 06-06-2002, 06:03 AM   #1
JokeZero
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Question Help! Can't get more then .05KPa

Here is the situation I have:

2002 WRX - 3 months old - 6000 miles
3/16th mod - Power Engineering Intercooler Shield - Prodrive shift knob.... no other mods.

No matter how hard I try, I can't get more then .05 KPa ( 7psi ). I don't remember if I ever did get more then this. I was being nice to the car for the first month. Started driving like normal the second month. Started driving harder the third month. From what I have read, this is normal for first and second gear. But, third, fourth and fifth????

Third gear at 5500rpm, 70 mph = max of .05KPa
Fourth gear accelerating 60 to 75 mph = max of .05KPa

Has anyone seen this before??? Any suggestions on what to check??? I haven't gotten any CEL's, and always run 93 octane. I pulled the Intercooler last night to see if anything was loose or not hooked up - nothing looked out of place. Reset the ecu - no improvement.

I don't wanna leave the car @ the dealership for a day or two while they try to figure it out. I was hoping there would be a quick fix or something.

Thanks in advance
Brian
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Old 06-06-2002, 06:49 AM   #2
mlambert
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wouldnt that be wastegate spring pressure

sounds like there might be an issue with your boost solenoid, you can give the lines a once over (check the $2.88 restrictor mod thread for tons of pictures of this area).

Most likely its just an unplugged hose...I would think...but hey I could be completely wrong here

but if it is what I think it is, the dealer could figure it out quick.
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Old 06-06-2002, 10:56 AM   #3
silvercharged
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Default Same thing happened to me...

My car also has about 6000 miles on it, and not ever having a turbo car before, I thought it was pretty fast, until I got my turbo gauge on... Then I could'nt get over about 7-8 psi (0.5 bar). Finally discovered that the boost hoses, at the solenoid, had been reversed, AT THE FACTORY! How did I know this? Because the hoses still had the white plastic spiral wrap around them where they were connected to the solenoid. The boost signal from the compressor nipple was going in the wrong end of the solenoid, hitting a dead end, and causing the wastegate to open at it's 8 psi setting. So I switched the hoses (Top solenoid hose to the tee, and bottom hose to the intake duct) and presto, 14.5 psi (1bar) . And I thought the car was fast at 8 psi

Thanks to Steve G (Gifty74) for helping me discover this...
Joe
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Old 06-06-2002, 02:24 PM   #4
zeke79
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did you put your 3/16 restrictor in the wrong place? if you put it in the wrong hose it will reduce your boost pressure.
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Old 06-06-2002, 06:41 PM   #5
JokeZero
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Post

I went thru the "Improve factory boost solenoid for $2.88 ", the 3/16th mod is installed in the correct location.

I still believe that all hoses are connected to "something" securely.

I am kinda hoping that SilverCharged and I are just some of the unlucky few. I can't wait to get out of work and go see.

I will be thrilled if it is that simple.... I will also be worried, "What else did Subaru assemble incorectly???"

The factory boost gauge paid off this time. I will try to get some pictures of this, so anyone without a boost gauge can verify that things are connected properly. I just have to remember where I put that camera.

I can't believe that I have driven the car for 6000 miles, and didn't realize that it should be faster SilverCharged is right, "And I thought the car was fast at 8 psi". I can't wait to drive my car, with all of the boost I paid for.

I will post a follow up tom'w... to let you all know how it goes....

Thanks again for all of your help everyone....
Brian
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Old 06-06-2002, 07:23 PM   #6
MAD REX
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It could also be your boost gauge
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Old 06-06-2002, 08:29 PM   #7
wackie
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Sounds to me like there's a decent chance you tapped your boost gauge in the wrong place. . . Where did you tap in? Do you see vacuum at idle?

Edit: I just noticed you have a factory boost gauge. Hopefully it's in the right place.

JD

Last edited by wackie; 06-06-2002 at 08:42 PM.
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Old 06-09-2002, 01:22 AM   #8
JokeZero
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Default Factory Screwed Up!!!

It is official... SilverCharged was right.

My car was set up exactly the same as his. Hoses to Boost Solenoid were reversed. Took me about a minute to switch the hoses around, and now my "toy" runs like it should.

That makes 2 out of approximately 18,000 units produced by Subaru, that are built wrong. Pretty good batting average, but we don't know how many people out there don't have a boost gauge to verify things are running right. If you weren't really looking for the boost, I doubt you would ever miss it.

I am gonna write to our friends at Subaru and let them know that they have an issue to address, I'll let you all know if I hear anything back from them.

SilverCharged- Thanks... PM me, and let me know if you would like me to include your contact info in my letter to SOA. If you are ever in NYC, let me know... I think I owe you a few Heinekens for saving me from a dealership visit.
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Old 06-09-2002, 06:23 AM   #9
BlueBerryRex
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hey i seem to have a problem similar..but not to that extent...i cant only get .085 on mine...and thats the highest its ever gotten up to..this reading came off of a blitz tt...anyone have any suggestions or comments? thanks
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Old 06-09-2002, 01:13 PM   #10
ScoobieSnaX
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Where is your blitz tt getting its boost readings from? Did you tap the vacuum line from the BOV or fuel pressure regulator?
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Old 06-09-2002, 02:39 PM   #11
JakRex
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JokeZero and Silvercharged, I have the same problem as your, but I am not familiar with those engine stuff. I really don't know which hose are you talking about... Is it possible that you guys can post some pics and give me some instructions to make it right?
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Old 06-09-2002, 02:46 PM   #12
mlambert
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yikes...3 people? just think about all the wrx's that dont and wont ever have a boost gauge

sad
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Old 06-09-2002, 03:50 PM   #13
BlueBerryRex
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scoobysnax, i tapped into the vacuum line for the blitz tt.
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Old 06-09-2002, 10:34 PM   #14
CaptainPuppet
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I have a oem boost gauge and my max reading is between .085 and .09, isn't this norm? If it isn't what should I be reading?
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Old 06-09-2002, 10:45 PM   #15
BlueBerryRex
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yeah it would suck if everyone elses' rex hit 0.1 while i only get .085
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Old 06-10-2002, 01:53 AM   #16
jskho
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i have a blitz TT and mine reads -.58 hkPA at idle and the peak boost i got was at 0.91 hkPA and that is around 6000 rpm.. is that normal ???? how do i convert my measurement to PSI???
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Old 06-10-2002, 02:15 AM   #17
BlueBerryRex
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hey jskho thats a hell of a lot better than mine...dotn know why i cant hit higher numbers
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Old 06-10-2002, 04:35 AM   #18
jskho
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blueberryrex check you unit of measurement is yours "kPA" ??? cuz mine is in "hkPA" not sure how that measure ment is??? is it kind of like cm vs mm ???
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Old 06-10-2002, 04:45 AM   #19
BlueBerryRex
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your right i incorrectly said kpa when its hkpa, i dont know the conversion, but i know .01 should be 14 psi, if i'm wrong anyone please correct me
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Old 06-10-2002, 06:40 AM   #20
jskho
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you sure 0.01 hkPA = 14 psi ??? and you your your blitz TT is reading only 0.01 ?? that is strange i got peak today of 0.95 hkPA.. not sure what psi it is.. but i dont know what the norm is either.. but these are what my boost gauge is showing.. also where is this wastegate hose that silvercharged was talking about
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Old 06-10-2002, 07:07 AM   #21
BlueBerryRex
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just because i read ur post, i went to my car (parked way the **** across campus) and i checked it, max boost was .85
so ur getting better numbers than me...i think we should ask one of the "scooby specialist" for this one
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Old 06-10-2002, 03:34 PM   #22
JakRex
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My problem's solved !!!
In my case, got nothing to do with the solenoid. It's just I connect the boost gauge to the wrong place. I was told to connect to the BOV to get most accurate reading. I did and it works prefect. I got .85 - .9 now.
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Old 06-10-2002, 06:11 PM   #23
jputnam
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I was just down at the subaru dealer and figured i'de yank out a set of the tech's factory service manuals.

So i looked up the duty solenoid (the solenoid in question), and checked its hose connections. Suprisingly the book shows that all of you who just changed it in response to this article just made it backwards.

Not to say the book isnt wrong.. but does anybody have a firm understanding of how this particular solenoid functions?

Jeff
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Old 06-10-2002, 10:19 PM   #24
JakRex
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jputnam, detail please
I want to know more
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Old 06-10-2002, 10:31 PM   #25
jputnam
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Here is exactly what the subaru FSM & PArts guide Shows:

The top of the solenoid goes to the intake and the bottom connection goes to the Turbo (the T)

So what we need to do is find somebody who has them the way the manual explains. And does that person get the 14psi boost? I don't have a boost gauge so i can't comment. I'll try and get the dealer to give me a Subaru Scanner for a few minutes but i don't know that they'll do it.

Anyone have more info?

Jeff
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