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  1. cruisermatt

    Holley EFI Leaning Out / Drivability Issues

    Glad you were able to fix it. As for the filters, double check the Holley instructions, the one you have is what they recommend for the pre-pump filter only.
  2. cruisermatt

    Holley EFI Leaning Out / Drivability Issues

    Guessing you actually meant 33033 as a 33003 is a lawnmower filter... either way 33033 is only a 20 micron filter so not really rated for EFI. (Holley states a minimum of 10 micron rating for EFI fuel filters). I would swap the injectors and see if the issue follows. I would bet you have a...
  3. cruisermatt

    Holley EFI Leaning Out / Drivability Issues

    what are the odds your fuel system is garbage ?
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