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Thread: Stumbling at Start up

  1. #1
    Join Date
    Jun 2005
    Posts
    135
    Asking the God's

    Does anyone having ideas why on startup my truck is stumbling and sometimes won't start. After it comes up to speed it is fine. I have been running 92 octane because it all most impossible to find 93. around here. Allen said it would be fine but I am not sure. I am not getting any codes so I'm not sure what to look for.
    Any ideas will be considered
    Thanks
    01,Z71 Victory Red, sportside,5.3L, Flowmaster 40's, K&N Drop In, Airaid MIT Tube, TB bypass, Nelson Performance Hot Tune. Velocity Stack waste of money.

    Working to run with the BIG DOGS, tired of the porch. STS or LQ9 in the future.

    http://i56.photobucket.com/albums/g1...1/DSC02262.jpg

  2. #2
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Check fuel pressure at startup. While you have the gauge on the fuel line check for fuel pressure fluctuation, it should stay consistant.. Check for vacuum leaks or cracked hoses.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  3. #3
    Join Date
    Jun 2005
    Posts
    135
    Thanks RHB I will check that out. And for the leaks but shouln't I get a code for that?

    Thanks again
    01,Z71 Victory Red, sportside,5.3L, Flowmaster 40's, K&N Drop In, Airaid MIT Tube, TB bypass, Nelson Performance Hot Tune. Velocity Stack waste of money.

    Working to run with the BIG DOGS, tired of the porch. STS or LQ9 in the future.

    http://i56.photobucket.com/albums/g1...1/DSC02262.jpg

  4. #4
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Nope, GM hasn't gotten smart enough to put an inline fuel pressure sensor on thier vehicles yet.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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