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    • February 2025

    More content from February 2025

    Figure 2- Suspect of a lean condition, additional hydrocarbon in the form of propane was used as an experiment for enrichment. The performance of the engine (via exhaust gas analysis) will be evaluated with the enrichment occurring. This will help determine the next step to take.
    ACDC
    Fig. 3: Lexus eCVT. Large motor is M/G II.
    The rounded exhaust valve pocket and elevated intake manifold pressure come together like puzzle pieces inferring excessive valve overlap. Due to this valvetrain’s configuration, valve clearances are adjusted by way of selectable shims. The appropriate shim was chosen, and the clearances were brought back to within specification. The driveability symptom vanished, expected manifold vacuum was restored, and the fuel trim values nearly zeroed.
    The Trainer #157: Investing In the Right Scan Tool for You and Your Shop
    Photo courtesy of Milwaukee Tool
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    Photo courtesy of Matco Tools
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    Photo courtesy of Clore Automotive
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    Photo courtesy of KNIPEX Tools
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    Photo courtesy of Electronic Specialties
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    Photo courtesy of OPUS IVS
    OPUS IVS DrivePro2 Plus
    Photo courtesy of Innova
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