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Thread: Car runs, but now......

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    Car runs, but now......

    OK, so for those that haven't read the other entire 20 page thread, here's a low down, and what the current problems are.

    I just finished swapping in a 91 JDM TT motor, ECU, and harness into a 94 base. There have been a lot of issues, but now it's running, if rough. Right now, the biggest issue is the radiator.

    I followed the instructions at the link below, but the fan still won't turn on for anything. At the relays for the fans, there is power to pins 1 and 5, and possibly 3 (it varies for some reason?). If the engine gets warm enough, the driver's side fan will kick on to cool the motor, but when I turn on the AC, it doesn't turn on. Anyone got any ideas on this one? I'd wire a separate relay into this thing and call it done, if I could somehow slave it to the temp, so the fans would turn on like they're supposed to, but I'm not sure how that'd work. Thanks for looking!

    http://www.3si.org/forum/f53/1g-harness-2g-body-274771/

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    Have you hooked up power to the fan to know that its even good?

    -Ricer Evo 8: 8.75 @ 166 Best MPH of 167. Quickest 4G63 Powered Evo in The US!!!
    -Chris Cessna's Stock short block Evo 8: 9.76@150 Worlds Fastest Stock Motor Evo 8 and First Stock Block In The 9's!
    -Shawna's DD Evo 8: 9.97@143.88 Best MPH of 145 Full leather interior, A/C, navigation, stock brakes, cruisin 9's in style
    -Cory's Stock 7 bolt talon: 10.3@136 No crank walk here...
    -STM Stock turbo/motor Stealth RT: 10.95@127 Worlds Quyickest/Fastest and most powerful Stock turbo/ motor 3S
    -James STM built Pump gas Evo8 stock motor: 10.2@137 Stock long block, and only on pump gas!
    -Mike Faggiano Evo3 16g stock motor 1g 11.0@124 just a 16g knockin on 10's door.
    And the list goes on...

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    It is indeed. At one point I was able to ground pin 5 and have it run. And before I put it in, I tested both fans.

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    owner since 2004 Feedback Score 0 colt45 gto's Avatar
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    JDM radiator? is the rad in good shape?

    i mean sometimes those rads clog in the bottom rail where the senders are, they will not find heat if they are covered in sludge
    3si is dead long live 3sgto.org

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    No, it's a usdm, but I flushed it before I put it in. The reason it makes me think that it isn't the sensors is that sometimes, pin 3 does and does not have voltage. I haven't actually tested to see if this is related to the engine temp yet, but it does make sense. Unless I'm completely backwards on how that circuit functions.

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    Forum User Feedback Score 1 (100%) elyria_boy's Avatar
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    For 20 bucks at any parts store you could get an adjustable high temp regulator. I converted an air cooled engine to liquid cooled and used one to turn the electric water pump when it gets to a certain temp. They are for fans tho. Put sensor inline, turn screw to have it turn on between 150 and 210 degrees. Simple easy fix.

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    Sounds like a winner, thanks elyria.

    OK, so I'm bringing everything back to this thread. I've compiled a list of the symptoms of the car that need to be tuned, and if I have theories or steps I'm going to take on each one, I'll list them accordingly. If there are no ideas, I could use yours, guys, since I'm lost. I've never tuned my own car before.

    -car can't build any real boost: doing a pressure check this weekend, as well as installing the new injector insulators (upper and lower), as they seem to be part of the issue
    -when the car is warm, in 2nd, 3rd and 4th, when trying to give the throttle some go, at 3000-3500 RPM, the motor falls flat on its face
    -the TB plate sticks
    -when driving, taking my foot off the throttle, and leaving the car in gear, the car back/mis fires. Also noticed that when it fires out the back end, the WB is reading between 10-11. Seems to be connected
    -idles high: ground and adjust idle according to manual
    -BOV is constantly going off whenever I accelerate. It's an open atmosphere, and since I've never had an open atmo one before, not sure entirely how it should sound, but I definitely hearing a whirring noise from that area when accelerating.

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    owner since 2004 Feedback Score 0 colt45 gto's Avatar
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    it all sounds like a boost leak, the whole thing is connected.except the sticky butterfly, does it stick shut or open?

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    What BOV are you running?

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    It sticks shut. And it's an apexi open air bov. The guy claimed he didn't know the brand and said it was a recirculating.

    More issues to add to the list above:

    -It feels like when I shift, the exhaust hits the floor of the car. Time to get solid motor mounts?
    -When I accelerate, my car sounds like a car with a broken exhaust. Like someone blowing a raspberry. When I stop accelerating, and just cruise, it has a deep mean sound. Thoughts on the farting noise? I have no cat, if that helps.
    Last edited by GRSHOPR; 10-14-2010 at 02:09 PM.

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