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Thread: 87 Log intake T-1 code 45 think boost control solenoid bad?

  1. #1
    Hybrid booster
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    87 Log intake T-1 code 45 think boost control solenoid bad?

    Noticed my 87 Daytona Turbo 1 log intake, has a mp performance computer unsure of calibration, but usually maxed out at 12 psi. Lately it pegs the factory boost gauge at 15-16 and sets code 45. Thinking it is the boost control solenoid. Any idea where to find one? don't see them on rock auto or fwd performance.

    Am I going down the right path? Also have an 88 T-11 parts car, can I use one from it?

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    turbo addict
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    Re: 87 Log intake T-1 code 45 think boost control solenoid bad?

    Could be, I'd check all the vaccum lines first, I imagine one has rotted away, your car is acting like the wastegate is disconnected.

    test the silonode. apply 12volts and see if it clicks. blow air through it.
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    turbo addict Turbo Mopar Contributor iTurbo's Avatar
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    Re: 87 Log intake T-1 code 45 think boost control solenoid bad?

    Sounds like a good time to put a grainger valve controller on it.

    Also check the waste gate can and arm to see if it moves, using your hands and fingers on a cold engine. The spring inside the can will hold the rod and waste gate flapper shut pretty tight, but it shouldn't be stuck shut.

  4. #4
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    Re: 87 Log intake T-1 code 45 think boost control solenoid bad?

    Looked at vacuum lines already, the lines I see look good. Will check by the can again.

    Great suggestions I will check these items.

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    turbo addict Turbo Mopar Contributor iTurbo's Avatar
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    Re: 87 Log intake T-1 code 45 think boost control solenoid bad?

    If you have a MityVac or a regulated air pressure source, you could hook it up to the waste gate can port. Seems like it should start opening the flapper (rod movement) at 6-7 psi.

  6. #6
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    Re: 87 Log intake T-1 code 45 think boost control solenoid bad?

    Looked at it more closely, the vacuum line was broken 3/4 way through right at the wastegate can in a way that wasn't easy to see or find last night when hot. Fixed that section of line, cleared code, went for a drive to relearn boost, seems to be good now. Idle is much smoother too since fixing the vacuum line. Pulls a few more inches of vacuum on the gauge too.

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