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Thread: Idles fine, but dies above idle

  1. #1
    Registered User
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    CZCC-20418
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    Nov 2009
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    New Mexico
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    Default Idles fine, but dies above idle

    My Z was running fine for a while, then developed a fueling issue. The idle is steady at 1000 rpms and mostly smooth with the occasional pop. When cold (or at least just started) it seems able to rev and pull itself through the driveway, but pretty quickly it loses the ability to rev, sputtering if you touch the throttle, even without a load. None of this affects the ability to idle.

    Per the manual, I'm going to check the fuel pressure on the rail to see if the pump or regulator are bad, but I won't have access to the tester for a couple of weeks. Has anyone else experienced this, and if so what are other likely causes? I was thinking airflow or throttle position (though TPS seems far fetched.)

    The car is a 1975 with a rebuilt 1977 engine. (so I'm told)

    Thanks

    Geof

  2. #2
    im bee!!
    Member ID
    CZCC-18657
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    Jan 2009
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    cali!
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    97

    Default

    Check your fuel pressure, fuel pump, fuel regulator , injectors (clogged can be a major problem)

  3. #3
    Z geek at large FastWoman's Avatar
    Member ID
    CZCC-19635
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    Jul 2009
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    Hampton Roads, VA
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    2,787

    Default

    Is your gasoline fresh?
    My last three sports cars while I still owned all three:

    2001 BMW Z3 Roadster 3.0i soft/hard top (sold)
    1966 Ford Mustang Coupe (sold)
    1978 Datsun 280Z (enjoying very much )

  4. #4
    Registered User
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    CZCC-22033
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    Jul 2010
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    Phoenix, Az
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    Default

    Check fuel injectors.

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