2002 STi in Yokosuka, Japan. Coupla questions.
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This is a discussion on 2002 STi in Yokosuka, Japan. Coupla questions. within the New Member Hangout forums, part of the Community - Meet other Enthusiasts category; Hey there. Picked up a 2002 STi in August of last year. I'm not sure what all mods are installed, ...

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    Registered User st8gunner's Avatar
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    2002 STi in Yokosuka, Japan. Coupla questions.

    Hey there. Picked up a 2002 STi in August of last year. I'm not sure what all mods are installed, I know it has DEFI gauges, adjustable Tein suspension, not sure of the exhaust, and for some reason it seems to be pretty popular here, a pretty small MOMO steering wheel, ha ha.

    I know this is primarily a US board, but I don't think I'd be able to read any Japanese STi forums. If any of you guys have knowledge of JP spec STi's feel free to weigh in.

    I have an intermittent check engine light that comes on, no real rhyme or reason to it. If it's idling and it comes on, a blip of the throttle makes it go away. If I'm driving at a constant speed and it comes on, shifting or going to neutral makes it go away. Usually occurs at less than 2.5K rpm, or after a couple of high rev shifts. Pretty annoying.

    Also, when in stop and go traffic, if I have to creep forward a few feet, after I clutch in to coast, the engine will feel like it's missing for about 5 seconds, then it smoothes out, sometimes with or without a check engine light.

    Took it to the dealer for the CEL problem, and through various iPhone translation apps, they replaced a part (not even sure what it was, piece of metal/plastic with two small plastic pipes for small rubber hoses to slip on) and that worked for about 3 days, and the CEL came back. Then they said they had to move a wiring harness to some work done for a previous owner, so they replaced/moved it back for free, about 8 hours of labor. Japanese customer service is pretty sweet.

    According to the gauges, max boost is 26.2 psi. Doesn't that seem a bit high?

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    Registered User st8gunner's Avatar
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    Also, pics for those interested. Iphone pics are all I have right now.
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    Registered User st8gunner's Avatar
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    Registered User st8gunner's Avatar
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    He simply abides. SD_GR's Avatar
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    26 PSI is abnormally high. Measuring in PSI is abnormal in and of itself though, are you certain of the units? In any case from what you say the car is over boosting.
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    Registered User oguitar's Avatar
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    That is a beautiful bugeye.

    Can you get the code read? 26psi does seem high but it could be tuned like that. Post some pics of the engine bay.
    Life is like riding a bicycle in order to keep your balance you must keep moving.

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    Registered User st8gunner's Avatar
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    Slight butterfingers. The boost gauge is in kpa x 100, highest I've seen is 1.7, with most around 1.5.

    1.7 x 100 = 170, used a measurement converter, 170 kpa = 24.65 psi.

    Most full throttle shifts are 1.5, = 150, = 21.75 psi.

    I had the code read at the dealer, and (again, this was pretty rough as the dealer spoke next to no English, and I speak about kindergarden/preschool level Japanese) and the code it was throwing was a resistance measurement out of spec, it was supposed to read xx though xx ohms, and it was reading higher, so they replaced this part (pic attached) but it turns out that wasn't the problem.

    I'll be pretty busy with work for the next 2 months or so, and this is my first boosted car, so I was just trying to track down the misfiring issue, maybe it was a common turbo issue that I'm not familiar with or something, and whether its safe to wait a little or fix it RIGHT NOW, cause the engine's gonna go. I'll take some pics of the engine bay tomorrow and post them, it's dark out now. Thanks for the help guys!

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    Registered User st8gunner's Avatar
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    Underhood.
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    You, sir, have a very Very rare front bumper! And the roof hatch is soooo cool! Your car is awesome! Good luck with getting it all straightened out!
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    Registered User oguitar's Avatar
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    The part that was replaced looks like the purge control solenoid valve.

    You said you are having misfires. Did you get the codes or are just thinking it is misfiring. That car is modded and has some grounding mods. Just a wild guess but I would think your issues are electrical related. Due to the intermittent nature. It would be good to find a Japanese tuner and see what he thinks.

    One day language differences will not exist but that is the future. Good luck getting this sorted out.
    Life is like riding a bicycle in order to keep your balance you must keep moving.

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    Registered User st8gunner's Avatar
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    I can't ever get the light to stay on long enough, when I took it in they only code they said it was throwing was that resistance out of spec. I don't have any hard evidence that it's missing other than I've had cars that missed before, and this feels just like it. Boost gauge bounces between -.8 and zero when it's doing it. Does it more frequently when it's hot outside.

    I'm down in Sasebo right now, I get back to Yoko next week and I'll see if anyone knows any tuners. Thanks.

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    Registered User oguitar's Avatar
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    Quote Originally Posted by st8gunner View Post
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    I am not sure what that clear plastic thing is. It looks like a check valve of some sort. Make sure all the hoses/vacuum tubes are in good shape and have clamps. Try and get the codes read.
    Life is like riding a bicycle in order to keep your balance you must keep moving.

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    Registered User cflip2x's Avatar
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    the plastic piece looks like an inline filter for a boost gauge
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