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Thread: TPS vs MPH 7427

  1. #1
    Fuel Injected!
    Join Date
    Jan 2017
    St Augustine FL.

    TPS vs MPH 7427

    95 gmc, 7427 OD tbi vortec 350. I noticed a difference between the TPS and the MPH while trying to tune a hesitation when accelerating from a stop. As soon as I touch the throttle its moving but its not showing speed on the dash for seconds after its throttled. Is it normal for this to happen?
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  2. #2
    Super Moderator dave w's Avatar
    Join Date
    Feb 2011
    The hesitation might not be the TPS vs. MPH. The Vortec heads flow much better than the TBI Swirl Port heads. Often the hesitation is a result of an off idle lean air fuel mixture.

    Possibly adjusting, by adding more fuel to the Acceleration Enrichment parameters will cure the hesitation.

    dave w

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