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Thread: 4.3 to 4.8 swap

  1. #1
    Join Date
    Sep 2016
    Posts
    3

    4.3 to 4.8 swap

    ' 99 Silverado with 4.8 vortec in it now, along with the wiring harness and ECM. Truck will fire but will not run, tried the reset of the the security system along with the 10 minute on 10 second off 3 times, still will not run. WHAT IS THE ISSUE. PLEASE HELP

  2. #2
    Join Date
    Nov 2009
    Location
    SAN ANTONE
    Posts
    781
    have you scanned for any codes, or check fuel pressure at the rail?
    06 rcsb, 6two, 231/235, 4.11, pacesetter, 80e, 14 bolt, Nelson tuned
    2011 rcsb 6two swap in the works with 6l90 and boost
    FARMTRUC CAN GARGLE PEANUT BUTTER

  3. #3
    Join Date
    Sep 2016
    Posts
    3
    no codes and fuel pressure is 62 lbs

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