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Z/28 trouble

This is a discussion on Z/28 trouble within the General Help forums, part of the LSx Technical Help Section category; test test My Z/28 has been having issues. On the highway it is as if I hit the fuel cut ...

  1. #1
    Senior Member Danger731's Avatar
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    Z/28 trouble

    test test

    My Z/28 has been having issues. On the highway it is as if I hit the fuel cut off. On a rural road it will stall completely then not start for a day or a hour.

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    Senior Member Danger731's Avatar
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    Yesterday I changed the fuel filter (original 120,000 miles) let it idle for 30 minutes then went to the car wash. Got home and it stalled in the driveway. Wouldn't fire back up. A hour later it did.
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    ʢ ൧ ൨ ൩ ൪ ൫ ൬ ൭ ൮Ր Ց Ւ Փ Smittro's Avatar
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    Quote Originally Posted by Danger731 View Post
    Yesterday I changed the fuel filter (original 120,000 miles) let it idle for 30 minutes then went to the car wash. Got home and it stalled in the driveway. Wouldn't fire back up. A hour later it did.
    Sounds like weakening fuel pump check your rail pressure during the times it wont start..

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    Veteran 0rion's Avatar
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    yeah, I would start with verifying fuel pressure. You can get a gauge at most parts stores for less than $20.

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    The Bandit Wesman's Avatar
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    Quote Originally Posted by 0rion View Post
    yeah, I would start with verifying fuel pressure. You can get a gauge at most parts stores for less than $20.
    Exactly. Then just take the black plastic cap off the end of the schrader valve on the fuel rail and screw on the fuel pressure gauge.

    With the key on, you should have 58-60PSI. If its below 58PSI, you're probably going to need a new pump.

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    Yo Da Lin The Valley..... astyles's Avatar
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    sounds like what mine was doing....changed the furl pump and it is all better

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    Senior Member Danger731's Avatar
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    Wierd, I thought the fuel pump either worked at 100% or didn't at all.

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    The Bandit Wesman's Avatar
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    Quote Originally Posted by Danger731 View Post
    Wierd, I thought the fuel pump either worked at 100% or didn't at all.
    Nope, not always. Sometimes you can get intermittent and/or low pressure.

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