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Trans am Starting issue, Fuel Pressure Regulator?

This is a discussion on Trans am Starting issue, Fuel Pressure Regulator? within the General Help forums, part of the LSx Technical Help Section category; Hello, I have a 1998 trans am convertible and have a starting problem. I have had the car for over ...

  1. #1
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    1998 trans am

    Trans am Starting issue, Fuel Pressure Regulator?

    Hello, I have a 1998 trans am convertible and have a starting problem. I have had the car for over a year. It would start cold just fine, but when it start warm it will take around 8 seconds. Also would start kinda ruff and would have a whining vibration noise for around 15 seconds after started. I have talked to some and they said it may be the fuel pressure regulator or the fuel pump. Any help would be greatly appreciated, Jim

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    Senior Member JayTA98's Avatar
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    Mean Black
    1998 Trans Am

    is the whinning noise coming from inside the fuel tank?

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    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    Hooking a fuel pressure gauge up is a quick/easy way to tell if its a fuel pressure problem. sounds like it could be

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    1998 trans am

    Thanks both for yr replies. The noise is mostly under the hood. The sound from the back end is the normal fuel pump sound. Yes i will use a gauge and to see what it is. Now if it was the fuel pressure regulator would there be a noticable drop off or a low constant pressure during the time of the noise?

    Thanks

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    Moderator Cutlass's Avatar
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    1999 Formula WS6 M6-sold
    2001 Silverado Z71

    The fuel pressure would be low on an extended crank.
    Quote Originally Posted by mrfriendly23 View Post
    Also would start kinda ruff and would have a whining vibration noise for around 15 seconds after started.
    This noise sounds like it could be the Secondary A.I.R. pump
    Refer to this thread for further AIR help.
    Secondary Air: Diagnosing and Removal

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