Question about 1990 Chevrolet Astro Extended

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Running rough and buzzing at throttle body injectors

1990 Chevrolet Astro, starts hard, runs rough, and has a buzzing sound from the throttle body injectors. I unplug the injectors and the buzzing stops. While its running it seems as if it has a miss, and there is a smell of gas. Any ideas would be appreciated.

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  • damopardude Jul 22, 2009

    I found no vacuum leaks.

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  • 118 Answers

Sounds like the engine has a vacuum leak at the throttle body area.

Posted on Jul 20, 2009

  • catvaman Jul 22, 2009

    Please verify the mileage on the vehicle. Injectors are somewhat noisy as they fire. More information is needed. Please explain, if you where driving while this accured and if it is hard to start and idles poorly, ect. I can help if I have all the fact. Thanks

  • catvaman Jul 22, 2009

    P.S Is the check engine light on and have you had it scanned for codes. Thanks

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