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  1. #1
    Fuel Injected! Resin's Avatar
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    Aug 2023
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    Can a vacuum leak possibly cause backfiring? I will throw my fuel pressure gauge on it tomorrow. No damage, I had a fire blanket at the ready and threw it over immediately.

  2. #2
    LT1 specialist steveo's Avatar
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    no even a massive vac leak will not cause a fire. a fire in your throttle body could only be a severely leaking injector (unlikely) or a timing or valvetrain issue. is it possible that while messing around diagnosing the previous issue you have clocked the distributor improperly

  3. #3
    Fuel Injected! Resin's Avatar
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    It is certainly possible. Would the rotor being backwards cause that? I.E. pointing at wire 1 when #6 is at TDC?

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